Does GM, or anyone else for that matter, sell brand new LT1 4 bolt main bare blocks??? I thought i heard someone say GMPP has them but not sure. thanks for any help!

 

You can't buy them new, your only chance to get one is to find a used one.

 

10125327...350...92-up...2 or 4...Gen.II LT-1, reverse flow cooling

They came in Corvettes... Check the salvage yards or corvette forums....

 

Also came in F-bodys that got replacement blocks.

 

You really aren't going to gain anything from it, for the price premium and what not I am going to say you would be better off just getting aftermarket splayed caps for your existing block if you THINK you need it. The two bolt blocks are plenty stout even with the stock 2 bolt mains, by stout I mean over 6500rpm strokers stout.

 

well thanks for answering my question and answering alot of questions i didnt ask.

yes i know which cars 4 bolt mains came in.

to the last post....my brother had a 383 LT! (2 bolt) iin his 93 corvette. he built it, with canfield heads and lots of other goodies. without spray it made 500 rwhp. now he's building a 409 LT1 and wanted to put the best parts in. And on an engine like that, with spray....a 4 bolt main is prolly a good thing to have

 

Got one if you want one,never had a piston in it.

 

I have heard more often than not that a 2 bolt block converted to 4 bolt with aftermarket splayed cap is stronger than the factory 4 bolt but I guess that wouldn't be best since it isn't Vette parts.

 

A splayed add on block is NOT stronger than a factory 4 bolt. A 2 bolt block was never designed to run 4 bolts,I don't care where they are put.The splayed add on caps are used because at an angle is the only place the 2 bolt block has enough material to put the bolt's and there is less machine work to fit the cap.

 

GMclaims that a two bolt main block will easily hold up to an engine producing 500 hp.Truthfully Ive never seen or heard of an lt1 breaking one of its main caps as long as its torqued to specs.

 

You can buy new LT1 blocks from More Performance. I think that they are $700.00!

 

You could try scroggins Dickey. I talked to them a couple years ago and they were using new LT1 blocks for their 383 short blocks.

From what I have heard it's not the problem of a cap breaking, its bearing movement. From what the shops I talk to told me once you start running high rpm and high hp bearing life becomes a big factor especially over 500hp.
It depends on who you talk to about splayed being better.
For the money I went with a 4 bolt block and ARP studs.

 

Ya im aware that a 2 bolt main is very capable....this isnt about what he needs as a bare necessity. Hes got the cash, and he wants to do this the best he can. A two bolt main was enough for his 383 that made over 450rwhp + 250 nitrous. now he's going bigger and badder.