1990 Mark IV LS-6 Engine Still In Crate! - Toyota Tacoma Forum
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#1 (permalink) Old 02-17-2009, 06:49 PM
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Post 1990 Mark IV LS-6 Engine Still In Crate!

This might not necessarily be for a Tacoma, but I'm hopin' somebody on here might want it. This engine is a 1990 or 1991 Mark IV (2-piece rear main seal) LS-6 Crate Motor (p/n 366250 if memory serves me correctly) that is a 4-Bolt Block with casting # of 10068286 and Rectangular Port – Open Chamber cylinder heads with casting # 6272990. The block is NOT a “CE” block which is a GM replacement block for people who had warrantee issues. The motor is in the crate and all ready to go. It has a 1053 Forged Steel crankshaft, 7/16” rod bolt 4340 Forged Connecting rods connected to TRW Forged pistons Closed Chamber configuration that produces 10.25:1 compression ratio topped off with the Aluminum High Rise intake manifold produced in the Winters Foundry. The rotating assembly has been balanced with a new Fluidamper harmonic balancer. This is the last of the years of the Mark IV engine design, because by 1992 GM went to the Gen V and then to the Mark VI. Price is $5000 OBO. PM me if interested.

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#2 (permalink) Old 02-18-2009, 03:30 PM
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Re: 1990 Mark IV LS-6 Engine Still In Crate!

*Bump* Anyone know of anyone working on a project Camaro/Chevelle/TA etc who might be looking for a 454? I didn't want to sell it, but I'm actually looking at putting the money toward a new Taco.
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