Whats the difference between the F-Body and Roadmaster LT1's?
 

I tried searching both this site and google, and couldnt find that much info about them. I'm looking to swap a lower milage engine into my Formula, and found an LT1 engine and transmission for sale that came out of a 94 Roadmaster. I know they have some diffenences, but I wasnt completely positive. Is it just the heads and intake manifold?? And if so, would I just be able to take the ones off my current formula and put them on there, and would that make it still identical to my current one?

I know some LT1's were different in the caprices, but how so in the Roadmaster???

I'm going be checking it out shortly, so any info would help.

Thanks,
- Mike

And should it just swap right in too? Or is there anything else I will have to do to get it to work?

B-body has cast iron heads,flow very well but heavy don't dissapate heat like alum.
B-body has a camshaft that is designed for bottom end TQ
as far as the internals: rotating assm. i believe they are identical

Sweet! Thanks!

Do you know if the computer in the F-Bodies would be able to work on it too? And if theres anything else I will need??

One more thing, I'd like to keep the transmission thats in my Formula right now which is a A4, would that work with the roadmasters LT1 engine? Or will it not bolt up?

Thanks again!!

Thanks,
- Mike

1993-1995 Y-body, F-body: 202/207 0.450/0.460 lift 116 LSA
1994-1996 B-bodies (including L99 4.3L): 191/196 0.418/0.430 lift 111 LSA
trans shouldn't be an issue (swap all your brackets/acc./waterpump,etc.) if your current pcm isn't having issues I'd stay with it.. gl on the swap :)

I decided to just buy the engine and not the transmission, and will be picking it up tommrow and hopefully starting on it thursday.

good luck let us know how it goes :D

The block itself is the same. Beware of th "baby" lt-1. Its a 265 cid motor not a 350. These things were only in the b bodies. Look for casting # 10168588 and 4.3 cast into the block.

Yeah, I made sure of it. lol. He actually had the car sitting right there, so that was one of the first things I checked.

:cheers:

i did the same u will have to shim some of the parts like altenator and everything on the front of the motor it sets a little further.

I got the same project kinda goin right now too. still gotta pull it out my wagon though. im in the area too.

If you use the b-body crank hub/pulley with b-body accessories and f-body with f-body, there should be no spacing issues. If you try to use a b-body hub/pulley with f-body accessories or vice-versa, they won't line up.