Fastime

Just thought I would post these up for anybody thinking about buying a set of these headers.

I bought these because I wanted ground clearance and room to install a set of 4 inch round cats .

The only tough part of installing the passenger side header and that was just a tight squeeze past the transmission bell housing , other than that it was a breeze.

Fastime

Warnd

Thanks for posting these pics. I am about to pull the trigger and order myself a set of these. Did you get them through here?: http://www.brphotrods.com/mm5/mercha...gory_Code=CNV3

Fastime

No , I bought them thru Pace Performance.

http://paceperformance.com/i-8349112-hd45726-1983-92-gm-f-body-1-3-4-mid-length-ls-engine-swap-headers.html

86White_T/A305

nice install,how does it sound open header lol?

Fastime

LOL , I don't know .. my neighbors are really bitchy so I'm not gonna try.

86White_T/A305

lol so are mine..cant seem to hear them when the car is running hmmm.

ZONES89RS

iTrader: (2)

Looks like a nice fot and decent for a bit of a budget,

Cranked my 6.0 powered mustang fr the first time last night at 11:30, 1 7/8 primary 3.5 collectors, im sure my neighbors were aware...

STREETDEMON

you won't be disappointed in these headers...mine are still looking great after 2500+ miles. i bought mine from brp though.

1ADan

iTrader: (4)

very cool to see these installed. I've been slacking for way to long on my set. still sitting in box after almost a year....

igotta355z28

iTrader: (1)

whats the part number for those headers?

Fastime

HD45726

sootie007

Looks nice .....got any pics of the rest of the system downstream ?

Fastime

Here you go.

https://www.thirdgen.org/forums/post...4-post449.html

sootie007

Total newbie here so forgive my ignorance ...is that hawks crossmember necessary to run the pipes like that ? And does the 700r , 4l60 use the same Hawks crossmember ? Thanks just getting started here .....

EDIT PS I have a 91 RS CONVERT SO I GUESS I WILL NEED THAT CROSSMEMBER TOO to run exhaust like this.....

Fastime

I modified a Hawks 4L60e crossmember to get the crossmember I have.

sootie007

Oh...so I am confused ...if someone wants to run these style headers on a 305 with 700r trans (91 RS) do you need a modified ( hawks crossmember) for clearance in place of the factory crossmember ?

Fastime

as far as I know nobody makes a double hump crossmember for a 700r4 , altho the 4l60e crossmember is not far off.
https://www.thirdgen.org/forums/ltx-...uys-700r4.html

GMan 3MT

iTrader: (4)

I know this is an old post, but it's one of the few with these particular headers. I know the OP and 'streetdemon' used these, but both relocated the A/C compressor. On the Pace website, it says "Passenger side top mount A/C is required".

Is that true, or just they say that to avoid having to notch the k-member like most one this site (with A/C) end up doing?

Also, another thread mentioned these wouldn't work with engine mounts other than the BRP ones. Surely they can't be that different.

STREETDEMON

I'm using eBay SBC clamshell conversion plates with no issues.

wildmon69

iTrader: (1)

I am about to pull the trigger and buy theses headers myself. I'm wondering if anyone in this thread who has used them has used hawks motor mounts for their swap.

68-87Chevy

I have these headers myself. Using the SPOHN motor mounts and the crossmember with the torque arm that attaches to it. In the middle of the LS swap right now, but I can try and take some pictures. Had to tweak a few brake lines over but nothing is hitting frame or transmision tunnel right now. No AC though.

Ozz1967

iTrader: (4)

Will these work for using a Y-pipe for a factor fit single 3" style exhaust? Looks like the driver side hangs down just a tad too far for it.

My plan for AC is to bring the AC up top using the accessory adapters for it.

STREETDEMON

no factory sbc stuff will mount to this including y-pipes.

you will need to fab your own y-pipe, but the rest of the "cat back" exhaust will work.

Ozz1967

iTrader: (4)

I would have a shop fab up a mandrel bend y-pipe for me. Just by looking at the pictures it seems like it sits lower than the Hooker 2055 shorties I have on the car now so it made me wonder how that would work since the driver side tube on the y-pipe bends forward and around the oil pan and behind the cross member.

Really silly these companies don't make a y-pipe to fit.

STREETDEMON

you don't run the pipe forward, these are mid-length headers, not shorties. the pipe routing is the same as a long tube. they run down the sides to the back of the transmission and then the driver's side crosses over and y's to the passenger side. if you find my build thread there are plenty of pictures that show this.

Ozz1967

iTrader: (4)

Ok. I'm going to have to look at this then because long tubes don't fit around Auto Trans missions. And even coming up behind the trans, I don't see how I won't have ground clearance issues. Need custom Trans Cross member then.

Ozz1967

iTrader: (4)

I wonder how that would work with my factory cross member. May need to look into that Hooker cross member then...

STREETDEMON

i use the hawks double hump on my t56, works great.

Ozz1967

iTrader: (4)

Yeah, but I need one that works with a 700R.

Ozz1967

iTrader: (4)

What about something like this:

Holly Manifold

toddoky

Although the Hooker 3rd-gen F-body LS swap headers and dual exhaust system will clear your 700R4, the Hooker transmission crossmember is not directly compatible for use with it. The 700R4 mount location is too far forward, so you would need to purchase/use the extension housing that is available for 700R4 transmissions that moves the mount location to the extension housing at the same location as a TH400. You can almost always find them on eBay.

Ozz1967

iTrader: (4)

Think you can find me a link to get me started so I know where I"m looking for this?

toddoky

Just do a search on ebay for "700R4 extension housing" and look at the ones that have the boss/holes to accept the transmission mount near the rear of the housing. They are almost always available from a couple of different sellers.