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I work at the shop that built his current motor!!!! Well also built his last 4 or 5 motors to!!!!! Thats how i know!!!! Yes the LS-7 block is the way to go, but combo has to be tuned good!!! Marks good friend, and coworker Dave M., tunes the motors!!! The max bore size on the LS-7 Block, is only +.010 overbore! It has a pressed in sleeve. Bore std., is 4.125! WE have slightly stroked them to 4.125, witch makes them a 439 cid!! We currently have a 740hp,n/a combo, pump gas, streetably!!!!

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