LS7 on BaT right now
Thread Starter
Safety Car
Joined: May 2004
Posts: 4,364
Likes: 1,588
From: los altos hills california
Safety Car
Joined: Dec 1999
Posts: 3,605
Likes: 839
From: PA
There are two LS-7 engines in the early 1970s.
The first was the intended for production LS-7 from 1970. This was basically (with a few exceptions) a 1970 LS-6 Chevelle engine with closed chamber aluminum heads (842) in place of the closed chamber iron heads (291). It had 11.25 to 1 compression ratio, vacuum secondary Holley carburetor, and a revised camshaft that differed slightly from the 143 street mechanical camshaft (although still a street camshaft).
The second was an OTC LS-7 engine released around 1973. This was an all cast iron (block and heads), 454 cid version of the 1969 L-88. Heads were open chamber (cast iron), compression was 12.00 to 1, and camshaft was most likely the 180 cam used in the second design L-88 and ZL-1.
The engine listed on Bring A Trailer is the second version.
Two very different engines.
Regards,
Stan Falenski
The first was the intended for production LS-7 from 1970. This was basically (with a few exceptions) a 1970 LS-6 Chevelle engine with closed chamber aluminum heads (842) in place of the closed chamber iron heads (291). It had 11.25 to 1 compression ratio, vacuum secondary Holley carburetor, and a revised camshaft that differed slightly from the 143 street mechanical camshaft (although still a street camshaft).
The second was an OTC LS-7 engine released around 1973. This was an all cast iron (block and heads), 454 cid version of the 1969 L-88. Heads were open chamber (cast iron), compression was 12.00 to 1, and camshaft was most likely the 180 cam used in the second design L-88 and ZL-1.
The engine listed on Bring A Trailer is the second version.
Two very different engines.
Regards,
Stan Falenski
Old Pro Solo Guy
Joined: Dec 2017
Posts: 8,094
Likes: 4,449
From: Marlton NJ
I bought all the parts for my 10.5 CR LS6 individually, just a couple years ago, and my buddy got me several good deals, and I still spent $13k.
Mine has all the right castings, just incorrect dates. A correct dated, coded and stamped block would have run the price up another 2k. I passed.
I don't think this one should go any higher.
And it is only worth that if someone wants to pay a premium for the XCH code, proving it's an original OTC motor, but what is that really worth?
And you have to really want 12.5CR, race gas, and a wild ZL1 cam or you'll just be re-building it, anyway.
Small market.
Mine has all the right castings, just incorrect dates. A correct dated, coded and stamped block would have run the price up another 2k. I passed.
I don't think this one should go any higher.
And it is only worth that if someone wants to pay a premium for the XCH code, proving it's an original OTC motor, but what is that really worth?
And you have to really want 12.5CR, race gas, and a wild ZL1 cam or you'll just be re-building it, anyway.
Small market.
