Besides the Corvette blocks that came with the 4 bolt mains, did any other lt1 cars come with 4 bolt mains? A guy told me that he would sell me a lt1 block out of a 93 Fleetwood and it has 4 bolt mains. Is this true or what?

 

Unless it was replaced with a crate motor or the vette motor it most likely does not have 4 bolt mains (unless of course it was converted).

 

I agree 100%

That being said, I do have a 4-bolt main LT1 in my camaro, but it was a crate engine. My original was a 2-bolt. All iron head LT1s that I have ever seen apart are 2-bolts, period.

 

Definately pull the pan and look, recently I bought an LT1 out of a vette sight unseen extremely cheap and when I got it home I dissassembled it and it was a 2 bolt er ran the Vin on the block and it was a Z motor. Obviously the original motor in the vette had gone south and the owner replaced it with a Z motor.

 

I believe the factory kept a number of 4-bolt blocks in inventory as replacement engines. Apparently they decided to use the 4-bolts instead of keeping 2-bolts on hand. However, you would probably have to look far and wide to find any left, including 2-bolt short blocks.JMHO

 

93 Fleetwood got an LO5 not an LT1 don't know if it was 2 bolt or 4 but that pretty much doesn't matter anymore does it. The b and d-bodies only got the LT1/L99 94-96.

Do not get all hot and bothered over the factory 4 bolt, by the time they are genuinely a good idea you would be better off starting with a 2 bolt block and doing a splayed conversion.

 

In late 1996, they used a number of 4 bolt blocks when supplies of 2 bolt ones got slim. From what I understand, anything during this time period was game for one. I agree with Dwayne, a 2 bolt with splayed caps is more desireable.

 

Does it really matter? What are you more concerned with? Purchasing a block with 4 bolt mains, or one from a particular model vehicle? I'm confident the guy can count. Either he is selling you a 2 or 4. Sure, it is possible a few blocks found there way to other than designated destinations. Haven't you ever heard of someone swearing they had a 4 bolt in their F body? After all, chevy put those blocks in at least a few hundred vehicles. Just about anything is possible.

Edit: Guys, gotta add this edit. Regarding what 'capricemgr' stated, what does he know? He literally 'drops' his cams in his engines.

 

actually capricemgr is correct, the fleetwoods dont ahve an lt1 in it, they have the lo5 which just ahs teh same intake design that makes it look like an lt1. dont be fooled, they aren't 350's

 

Notice the smileys, Gary was up for a mod day and we took a rather unsusual approach to the cam installation. His idea, rather weird but simply brilliant at the same time ensured we didn't wack a bearing on the way in like we had on the way out (he wasn't involved in that part).

 

When I was a kid I was putting a big fancy hyd cam in my 70 Camaros 350 . I tripped walking to the car (with the cam in my hand) it hit dead center to a cynder block I had on end for a seat and it broke in half...I cried.

 

Didn't Isaac Newton do that when he came up with the inertia/laws of motion theory?

 

But that was a Steam engines ball valves