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The L86 is the truck 6.2, that's the block and heads I have. I know the L86 (6.2) heads are different from the L83 (5.3) heads. I'm curious on what, if anything, is the difference between the L86 6.2 heads and the LT1 6.2 heads.
Absolutely nothing. The long block itself including the cam and all is identical between the truck and the Camaro/Vette.