LT1 Block
Melting Slicks
Joined: Mar 2003
Posts: 2,472
Likes: 0
From: Toronto ONTARIO
Basically your answer is yes. Corvette LT1 blocks are 4 bolt mains and Camaro were 2 bolt.
I've been speaking to a manufacturer to produce an aluminum LTx block for some time now. We're working out details on a prototype block that I may have by the end of the year
.. and its aluminum 
I've been speaking to a manufacturer to produce an aluminum LTx block for some time now. We're working out details on a prototype block that I may have by the end of the year
.. and its aluminum
Safety Car
Joined: Apr 2005
Posts: 3,624
Likes: 431
From: Dale City VA
Actually there are 3 different Gen II blocks. But only 2 of them are useable for performance build ups.
1)5.7L 4bolt caps (Corvette only) Alum Heads (LT1 300hp, LT4 330hp)
2)5.7L 2bolt caps (F & B bodies) There are 2 different versions of this engine F bodies have Alum heads and big cam(LT1 275hp). The B bodies have cast iron heads and smaller cam(LPO9 260hp).
3)4.3L 2bolt caps (B body)You don't want one of these under any circumstances they are useless.
Will
1)5.7L 4bolt caps (Corvette only) Alum Heads (LT1 300hp, LT4 330hp)
2)5.7L 2bolt caps (F & B bodies) There are 2 different versions of this engine F bodies have Alum heads and big cam(LT1 275hp). The B bodies have cast iron heads and smaller cam(LPO9 260hp).
3)4.3L 2bolt caps (B body)You don't want one of these under any circumstances they are useless.
Will
Team Owner
Joined: Mar 2001
Posts: 30,837
Likes: 289
From: Boston, Dallas, Detroit, SoCal, back to Boston MA
Originally Posted by DieL
Basically your answer is yes. Corvette LT1 blocks are 4 bolt mains and Camaro were 2 bolt.
I've been speaking to a manufacturer to produce an aluminum LTx block for some time now. We're working out details on a prototype block that I may have by the end of the year .. and its aluminum
I've been speaking to a manufacturer to produce an aluminum LTx block for some time now. We're working out details on a prototype block that I may have by the end of the year
.. and its aluminum 
are they BIG BORE by any chance? I'd put myself down for one, even in cast iron. a 427+LTX would rock! 
Thread Starter
Melting Slicks
Joined: May 2006
Posts: 3,385
Likes: 4
From: King George VA
Originally Posted by Corvette Kid
I've got a nice Vette LTx bare block for sale but it'd be around $150 to ship it to you.
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Burning Brakes
Joined: Oct 2006
Posts: 834
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Originally Posted by lefoy84
The blocks all have the same casting numbers. The only way to tell if it's 2 bolt or 4 bolt is to look. The 2 bolt is still good for 400 HP plus.
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by fc_soldier
How much you want for it? How much does it weigh?
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
Originally Posted by DieL
Basically your answer is yes. Corvette LT1 blocks are 4 bolt mains and Camaro were 2 bolt.
Originally Posted by rklessdriver
3)4.3L 2bolt caps (B body)You don't want one of these under any circumstances they are useless.
Elite Torch Red Member
Joined: Sep 1999
Posts: 57,805
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From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
Safety Car
Joined: Dec 2002
Posts: 3,655
Likes: 24
From: Charleston SC
Originally Posted by Vis Croceus
Some cars other than Y-bodies came with 4 bolts. LT4s for starters. People have also reported LT1 F-bodies with 4-bolts from the factory.
He asked about LT1 blocks. That is not an LT1 block.
He asked about LT1 blocks. That is not an LT1 block.
From Mojo's link
"There was only one block used for the 265 cid version of the LT1. It’s a 10168588"
Le Mans Master
Joined: Jul 2000
Posts: 5,012
Likes: 5
From: OKC OK
Originally Posted by DieL
I've been speaking to a manufacturer to produce an aluminum LTx block for some time now. We're working out details on a prototype block that I may have by the end of the year .. and its aluminum
.. and its aluminum 
I'd love to see (and get) an aluminum LTx block w/ a bigger bore option...I'd assume they'd sell well, if priced similar to the LSx motors...keep us posted
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
Originally Posted by FD2BLK
From Mojo's link
"There was only one block used for the 265 cid version of the LT1. It’s a 10168588"
"There was only one block used for the 265 cid version of the LT1. It’s a 10168588"
As powerful as he is, even Mojo can't turn an L99 into an LT1 by simply renaming it.
Elite Torch Red Member
Joined: Sep 1999
Posts: 57,805
Likes: 23
From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
Originally Posted by Vis Croceus
As powerful as he is, even Mojo can't turn an L99 into an LT1 by simply renaming it.