Finally: Holley to produce LT and True Dual System - Third Generation F-Body Message Boards


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Finally: Holley to produce LT and True Dual System

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Old 09-17-2015, 07:37 PM   #1
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Finally: Holley to produce LT and True Dual System

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Old 09-17-2015, 08:22 PM   #2
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Re: Finally: Holley to produce LT and True Dual System

Wow! I just reviewed the linked thread and the general between the frame fit and ground clearance of the LT headers appears to be quite impressive.

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Old 09-17-2015, 08:59 PM   #3
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Re: Finally: Holley to produce LT and True Dual System

Man that looks good!
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Old 09-17-2015, 09:12 PM   #4
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Re: Finally: Holley to produce LT and True Dual System

This is just great... I had given up on aftermarket support for use of the 4L80e and long tubes and went it alone with mid length and hand fabbed 3" Y-pipe....and it's low hanging too.


well? I'm happy for the guys who come after me,but I'm finished with that stage of the LS conversion and not about to throw it away.....just yet....
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Old 09-18-2015, 03:23 AM   #5
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Re: Finally: Holley to produce LT and True Dual System

by the way... if their 4th gen fbody system is any sign.. this one will likely be 1400ish for headers and dual system and anywhere from 650-800 for just the true duals.
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Old 09-18-2015, 07:28 AM   #6
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Re: Finally: Holley to produce LT and True Dual System

I might be interested in this if I do a LSx swap.
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Old 09-18-2015, 01:12 PM   #7
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Re: Finally: Holley to produce LT and True Dual System

That trans crossmember looks pretty awesome.. and since it seems to work with a T56, I might need to get one depending on the price. It will certainly help my ground clearance issues!
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Old 09-18-2015, 06:15 PM   #8
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Re: Finally: Holley to produce LT and True Dual System

In the thread at ls1tech they make it very clear the trans crossmember works with their motor mounts. Not sure if that excludes other motor mounts?

Hawks has a double hump crossmember if that is all you need. Or search out a used Skulte.
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Old 09-20-2015, 02:16 PM   #9
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Re: Finally: Holley to produce LT and True Dual System

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In the thread at ls1tech they make it very clear the trans crossmember works with their motor mounts. Not sure if that excludes other motor mounts?

Hawks has a double hump crossmember if that is all you need. Or search out a used Skulte.
I bet the entire set is at or near the cost of the Hawk's header/ypipe..lol
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Old 09-20-2015, 05:00 PM   #10
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Re: Finally: Holley to produce LT and True Dual System

^^ Wonder how long until they rip off the design and sell it as their own?
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Old 09-23-2015, 12:12 PM   #11
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Re: Finally: Holley to produce LT and True Dual System

When is it going to be available?
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Old 09-23-2015, 03:07 PM   #12
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Re: Finally: Holley to produce LT and True Dual System

this is something I have been waiting for !
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Old 09-23-2015, 05:07 PM   #13
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Re: Finally: Holley to produce LT and True Dual System

Where do I send my money? lol
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Old 09-29-2015, 02:18 PM   #14
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Don't much care for the fake quad outlets, but otherwise looks like a decent system. I've been thinking about giving my LS1/4L60E some more punch (like 400 cubes, TH400), and was thinking I should do 1-7/8" primaries while I'm at it, but the current 3" single wouldn't cut it. This would be a nice option assuming it doesn't break the bank - $2k probably isn't too wild of a guess (mounts, headers, exhaust).

From the last post by OP toddoky:

I'm posting these part numbers for you guys who have asked for them...none of these components are on the shelf yet and some of these part numbers haven't even been entered into our system yet, so don't go hitting up your favorite parts source to place an order at this time as there's no way for them to be able to process it for you. I will keep you posted as to when each part is actually released and capable of being ordered.

70101316-RHKR- 1-3/4 x 3 long-tube headers, 82-92 F-body LS swap, stainless steel
70101315-RHKR- 1-7/8 x 3 long-tube headers, 82-92 F-body LS swap, stainless steel
71221003HKR- 82-92 F-body LS swap engine mounting bracket kit
71222005HKR- 84-92 F-body LS swap transmission crossmember
71223003HKR- LS swap 4L80/4L85 transmission crossmember adapter bracket
71223004HKR- LS swap 4L60-4L70 transmission crossmember adapter bracket
70501326-RHKR- 82-92 F-body header-back exhaust system, 2.5" - 304SS - Auto Trans
70501426-RHKR- 82-92 F-body header-back exhaust system, 2.5" - 409SS - Auto Trans
70501339-RHKR- 82-92 F-body header-back exhaust system, 2.5" - 304SS - T56 Trans
70501439-RHKR- 82-92 F-body header-back exhaust system, 2.5" - 409SS - T56 Trans
71223006HKR- 82-92 F-body fuel/brake line heat shield
71223007HKR- LS engine starter heat shield
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Old 10-01-2015, 08:59 PM   #15
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Re: Finally: Holley to produce LT and True Dual System

Great, except that all their LS products are grossly overpriced, plus no way to fit even one cat, let alone 2, this is dumber than Forrest Gump.
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Old 10-01-2015, 11:56 PM   #16
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Re: Finally: Holley to produce LT and True Dual System

Hopefully they will have a version for stock/aftermarket cats. I am using stock cats and will be street legal in California,
so no long tubes for me.
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Old 10-02-2015, 04:35 PM   #17
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Re: Finally: Holley to produce LT and True Dual System

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Great, except that all their LS products are grossly overpriced, plus no way to fit even one cat, let alone 2, this is dumber than Forrest Gump.
Seeing how well priced the 4th gen system is.. your comment seems... misplaced. The lack of cat placement has been mentioned in the thread about the 4th gen system.

"Thanks for posting over there as I don't have the bandwidth to join and post on another forum at the moment. Do me a favor and give a reply to the guy who complained about the price of Hooker LS products...tell him engineered parts that produce better results generally cost more money." -Holley Rep.

Last edited by RaverRacerX; 10-02-2015 at 07:27 PM.
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Old 10-04-2015, 08:05 PM   #18
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Re: Finally: Holley to produce LT and True Dual System

This is awesome! However, I don't have the LS setup and already have Dougs LT headers. I wonder how hard it would be to fit the pipes to my headers and whether or not the 4l60 crossmember would work on the 700r4? I know 4l60 and 700r4 are the same trans, but I don't know if the LS engines move the transmission fore/aft which would obviously change the trans crossmember they built for that. Any thoughts? I'd love to buy the header-back system and crossmember if they will work. If no responses here, I might join the other forum to ask, I would just feel like a real **** joining an LS site to ask a non-LS question.
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Old 10-05-2015, 03:27 PM   #19
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Re: Finally: Holley to produce LT and True Dual System

asked for you
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Old 10-05-2015, 04:44 PM   #20
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Re: Finally: Holley to produce LT and True Dual System

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This is awesome! However, I don't have the LS setup and already have Dougs LT headers. I wonder how hard it would be to fit the pipes to my headers and whether or not the 4l60 crossmember would work on the 700r4? I know 4l60 and 700r4 are the same trans, but I don't know if the LS engines move the transmission fore/aft which would obviously change the trans crossmember they built for that. Any thoughts? I'd love to buy the header-back system and crossmember if they will work. If no responses here, I might join the other forum to ask, I would just feel like a real **** joining an LS site to ask a non-LS question.
Might not be as bad as you think. I think the transmission mount has slotted holes to allow some fore and aft movement, maybe an inch. The hard part is routing the rest of the system which is already done in the kit.
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Old 10-05-2015, 05:28 PM   #21
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Re: Finally: Holley to produce LT and True Dual System

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asked for you
Thanks!!

For those interested, I see that he already replied on the other forum. Looks like some fab work to make it happen, but that's to be expected with LT headers and dual exhaust. Here's what he said:

"The 700R4 and 4L60 do share many internal parts, but their external geometry and mounting dimensions are different. The 700R4 rear mounting pad is located in the case like on a TH350 and the mounting pad on the 4L60 is located about 2" further back in the extension housing. The Hooker crossmember will not work in a SB/700R4 application, so you would have to make custom pipes to route the Hooker dual exhaust under/around another crossmember to connect the system to the Doug's headers mentioned."
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Old 10-05-2015, 05:51 PM   #22
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Re: Finally: Holley to produce LT and True Dual System

I see you already saw it..lol
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Old 10-06-2015, 05:57 PM   #23
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Great, except that all their LS products are grossly overpriced, plus no way to fit even one cat, let alone 2, this is dumber than Forrest Gump.
Stupid is as stupid does...

Try pricing a custom system of this quality. Let us know how that works out for you.

They aren't claiming to meet everyone's needs. They chose a certain portion of the market and are filling that need. Rather than slam them, how about kudos for at least supporting part of the market? If emissions-legal swaps prove to be a profitable market, then I'm sure they'll go after that, too. In the meantime, market forces prevail.

(You may note in that thread that I commented on the availability of 1-7/8" primary trifive LS headers, and their response. Perhaps they'll come out with that product before I hit the button - if so, fine; if not, then their competitor that already has that product will get my business.)
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Old 10-08-2015, 06:05 PM   #24
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Re: Finally: Holley to produce LT and True Dual System

Those motor mounts don't look to be all that special. So what Holley vendor is gonna get the best price?
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Old 10-12-2015, 01:20 AM   #25
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Re: Finally: Holley to produce LT and True Dual System

I went ahead and ordered the trans crossmember (and only the crossmember). If it lines up then I will sell my Skulte crossmember.
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Old 10-12-2015, 11:14 AM   #26
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Re: Finally: Holley to produce LT and True Dual System

Who did you order it through?
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Old 10-12-2015, 11:44 AM   #27
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Re: Finally: Holley to produce LT and True Dual System

Right off the Holley website.
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Old 10-13-2015, 09:06 AM   #28
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Re: Finally: Holley to produce LT and True Dual System

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I went ahead and ordered the trans crossmember (and only the crossmember). If it lines up then I will sell my Skulte crossmember.
I'm feeling the same way. Keep us in the loop on this. SPD T56 for sale soon...
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Old 10-13-2015, 11:08 AM   #29
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Re: Finally: Holley to produce LT and True Dual System

Definitely waiting to see what you think, Qwk. It's pricey, but if it works out well, then I'm going to bite the bullet and get it. I want my ground clearance back!
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Old 10-13-2015, 09:07 PM   #30
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Re: Finally: Holley to produce LT and True Dual System

We have all been waiting for this. For about 30 years. I found about this yesterday. The day before I was about to start chopping up an aftermarket crossmember and starting custom fabrication. My crossmember, and bolt in true dual system are on order. I already have the stainless works long tubes. I am going to see how the fitment will work with them before I spend the $1K for the headers. Hopefully will only have to adapt a short section of pipe to make it work. If not I will have a set of long tubes for sale cheap. Still cheaper than the custom work I was planning on.
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Old 10-13-2015, 09:28 PM   #31
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Re: Finally: Holley to produce LT and True Dual System

Yes, I agree. A double hump trans x-member with torque arm mount has been a big hole waiting to be filled in the market.
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Old 10-13-2015, 10:39 PM   #32
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Re: Finally: Holley to produce LT and True Dual System

When I ordered the kit today the availability date was 10/16. Should recieve and have installed within 1/2 to 2 weeks.
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Old 10-14-2015, 10:54 AM   #33
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Re: Finally: Holley to produce LT and True Dual System

Pictures please!
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Old 10-14-2015, 12:59 PM   #34
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Re: Finally: Holley to produce LT and True Dual System

I will definetly post some pictures as soon as I get it installed
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Old 10-21-2015, 05:20 PM   #35
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Re: Finally: Holley to produce LT and True Dual System

I gotta get some stuff sold so I can order this... Still waiting on those pics
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Old 10-22-2015, 08:06 AM   #36
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Re: Finally: Holley to produce LT and True Dual System

Very interested to see some first hand accounts of this system when everyone starts getting them. The whole set up is a pretty big pill to swallow but looks competitively priced for what it is.. and I think I can get a little discount through work. Probably still can't swing the whole thing right now, but we will see how long my swap takes.

Do you think the mounts will work with different headers? Has anyone tried using the same mounting location with dirty dingo adjustables with the ebay headers?
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Old 10-26-2015, 08:49 AM   #37
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Re: Finally: Holley to produce LT and True Dual System

Still waiting on the parts to arrive. It has been almost 2 weeks.
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Old 10-26-2015, 12:37 PM   #38
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Re: Finally: Holley to produce LT and True Dual System

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Still waiting on the parts to arrive. It has been almost 2 weeks.
I did see a release date of 11/1 on some of the stuff, so it might be delayed a bit more?
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Old 10-28-2015, 06:17 PM   #39
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Re: Finally: Holley to produce LT and True Dual System

I have only the trans crossmember on order. I did a little digging today because my account was charged without shipping the product. That's a no-no in my book. What I did learn is the trans crossmember is scheduled out to December 4. Only 2 orders have been placed and we know who those two people are.

I'm just going to leave my order in the que because with every New Year comes price increases. Pulling my order would just cost me more in the long run.
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Old 11-07-2015, 09:32 PM   #40
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Re: Finally: Holley to produce LT and True Dual System

Any updates? I have a friend that works at Holley so I'll try to ask him soon.
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Old 11-08-2015, 08:22 AM   #41
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Re: Finally: Holley to produce LT and True Dual System

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I already have the stainless works long tubes. I am going to see how the fitment will work with them before I spend the $1K for the headers. Hopefully will only have to adapt a short section of pipe to make it work. If not I will have a set of long tubes for sale cheap. Still cheaper than the custom work I was planning on.
Basically the same situation. Would love to see the x-member work with the stainless works headers! Then I could get that ground clearance back, the bottom of the pipe section that goes under the current x-member is flat due to scraping/hitting the ground. If for some reason it won't work, add this setup to the list of things I don't have money for
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Old 11-10-2015, 11:41 AM   #42
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Re: Finally: Holley to produce LT and True Dual System

I am just wondering how many of us are running the same set up as I am. its a 408 with a 700r4. I have the stainless steel works headers. I have the exhaust system and the trans cross member on order. I am sure I can make it work but was wondering if you guys had any thoughts.

Last edited by Nighthawkmk; 11-10-2015 at 12:02 PM.
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Old 11-12-2015, 01:53 AM   #43
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Re: Finally: Holley to produce LT and True Dual System

Looking at the thread at ls1tech, it is now very clear that the trans crossmember will not align with non-Holley engine mounts.
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Old 11-12-2015, 09:03 AM   #44
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Re: Finally: Holley to produce LT and True Dual System

That is very unfortunate. I went back and read the whole thing and that disappoints me. Maybe if he takes your advice and designs plates to help, I'd get it... but I'm not about to drop a ton of money on a system that isn't compatible with ANYTHING else out there. As you said, they are limiting themselves.
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Old 11-12-2015, 11:25 AM   #45
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Re: Finally: Holley to produce LT and True Dual System

yes that is disappointing but if you go to there website they make adaptor plates for different transmissions, so my thought was all you would need to do is make your own adaptor plate to go with your engine mounts and trans.
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Old 11-12-2015, 04:12 PM   #46
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Re: Finally: Holley to produce LT and True Dual System

I'm disappointed about the need to use the Holley pan, instead of the typical F-body pan.
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Old 11-12-2015, 10:00 PM   #47
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Re: Finally: Holley to produce LT and True Dual System

Of all the things to go wrong with the trans crossmember, trans mount is the easiest to fix. Hoping everything else about it fits well.

I live close to Midwest Chassis and I tried all year to get my car over there to have my mid length arm welded up. Still not done because they are IMPOSSIBLE to work with. I'm hoping this Holley piece is my ticket to success and finishing my car.
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Old 11-13-2015, 12:17 AM   #48
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You guys complain about piecemeal stuff that doesn't fit, or doesn't work with other piecemeal stuff; then complain about someone offering you a bolt-in system but its pieces may not work with the piecemeal stuff you already have.

Take your pick, because you can't have it both ways.

Note my post #72 about applying to '82 & '83, and his response in post #73. He nailed it.

For the record, you don't have to use their pan - if you are okay with giving up bolt-in. You can use a 4th gen f-body pan and either notch the crossmember or the pan, just like people have been doing for, what, 15 years? Some people will be willing to spend the extra bucks for the Holley pan to avoid modifications. (And the Holley pan will allow full bellhousing bolts with either 4L60E or 4L80E, unlike the factory f-body pan.)
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Old 11-18-2015, 05:51 PM   #49
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Re: Finally: Holley to produce LT and True Dual System

I cancelled my order because there is now a holiday sale at a better price. Just going to turn around and buy again.
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Old 11-18-2015, 07:54 PM   #50
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Re: Finally: Holley to produce LT and True Dual System

Quote:
Originally Posted by QwkTrip View Post
I cancelled my order because there is now a holiday sale at a better price. Just going to turn around and buy again.
Do you know when the sale ends?
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