Hey guys. I've been lurking here for the past three years and never needed to create an account. (You boys (and girls?) are fantastic, and usually have already run into the problem I'm currently having.)


Here's my issue. I've got an '84 Berlinetta that I'm dropping a LT1/460LE into. Problem is, I had the LC1 2.8 V6, and the mounts for the LT1 aren't lining up. Do I need to drill new holes? Get different mounts?

The main problem is with the driver's side clamshell that mounts on the k-member (cradle?). None of the different holes on my k-member match up to it. Got any advice, or has anybody else done a 2.8 to 350 swap?


Any help would be appreciated.


There's a long history to this car, and if anybody wants to hear it, I'll give a full story, but here's some pictures of the swap, and of my restoration of the car so far.

Before:


After:



V6 Engine:


LT1 Before:


LT1 After: (it was fully rebuilt. Internals and all. I didn't just give it a paint job)

2 things. Did you replace the V6 mounts on the k member with V8 mounts? There should be 2 sets if holes, use the most forward ones. The other thing, the drivers side motor mount on the lt1 needs to be replaced with a normal sbc motor mount, using a set of holes right behind the stock mount. Needs to be slightly modded if running A/C. Good luck!

I replaced the passenger side. The driver's side is where I'm having trouble, because it's a bracket (clamshell) that attaches to the k member instead of a typical mount. Where can I get one of these clamshells?


I've heard I might need these: http://www.summitracing.com/parts/ADD-713111/?rtype=10 but I'm really hoping to avoid that. Any chance I can drill new holes for the clamshell?

That's an awesome orange

You do not need the mounts that you posted. You just need a stock sbc motor side mount for the drivers side. If you're keeping ac, it needs to be slightly Modified.

- I was thinking passenger side, sorry. Make sure you have the V8 mounts on the k member.

No he does need to change the K member side of the motor mounts. He needs v8 mounts instead of the v6 mounts

It's called burnt copper. The whole block is painted that color.

Does anybody have a picture of exactly what I need? In a few minutes, I'll put some trousers on and go take a picture of the mounts I currently have, but does anyone have a picture of the mount I actually need?

It's the rubber peices that the motor actually sits on when you put it on the k member, the bolt oes threw it. Go to autozone and look up motor mounts for a 92 z28 v8 and you'll see them, they are only $20

Like I said they are mounted to the k member it's self

I get that. But My problem is that the LT1 has a weird pattern where the passenger side has a clamshell attached to the motor, and a mount attached to the k member; and the driver's side has a mount on the engine, and a clamshell that's supposed to attach to the k member.


This is the driver's side. Orange mount attached to engine. Clamshell that goes on k member attached for reference.




And passenger side. Clamshell on engine, motor mount on k member.



Any help appreciated, and keep in mind that this is my first swap. Go easy on me.

Thanks.

o.o I have no clue

Get the normal f body engine side mounts. They will mount to the lt1 as normal, and allow normal install just like a normal small block. I'm by my car, I'll try to get a photo if its visible.

Here you go.

Thanks, WhiteBlaze. That's all I needed. I'll go pick some up from a junkyard tomorrow. If my memory serves, there's a TBI iroc over at the local junkyard, but if I can't find them there, I'm sure I can find a SBC on something, right?

From what I was told when I did my swap, it NEEDS to be from an f body. Worse case, check the classifies, that's how I got mine. Mine was a 2.8 a while back as well. If you're keeping A/C, the passenger side needs to be slightly modified.

People keep saying that. I want/need A/C. So what needs to be modified? Just to bend in the frame somewhere?

This thread should help you out.

Hey boys. Me again. Got the engine in today, but the mounts aren't lining up as easily as expected. Is it possible I put the clamshells on the wrong sides?

How much are you off by? Is it on both sides?

Erm. By about an inch on both sides. I'll try to get pictures in a couple minutes once I wash the grime and tranny fluid off of me.

Passenger side:

Driver side:


Advice?

Alright, boys. I'm going to be very embarrassed to admit this, but here goes:

I had the passenger side mount in the wrong holes, and upside down.

Engine's in. I'm gonna take a quick shower (I accidentally got drenched in turpentine and can feel my brain melting) and then go pop the transmission into place.

Good catch. Was a bit hard to tell from the pictures.

Aye. Now the only thing I need to do is swap my fuel tank for an iroc one with the in-tank pump. Is there anything I should know while doing this?

I did an inline pump on mine, so I have no idea.

What do I need to save/splice from the 2.8 harness? What can I cut out?

Check out the stickes, it wasn't all that bad.

I did, but I couldn't really understand most of it. Is there a picture anywhere of what plugs can be removed?



Also, I have two separate questions.

One, since I'm switching my carbureted fuel tank for an in-tank pump fuel tank, I'm going to need to plug in the new tank. There's a wire going to the old tank that has two prongs on it. The IROC tank has three prongs. Does anyone know what I need to do to get the new tank wired up?


And two, what are C210, C220, and C230 plugs and where do they go? Do I need them?


Thanks guys.

And the C100/C105 plugs?

Fuel pump wasn't all bad, just time consuming getting it out if you've never done it. I got a Walbro 255lph and it came with the direct plug in harness.

But as for wiring, not my department. Lol