Depending on your build date you may already have an ls6 bottom end from gm. Only difference is cam and heads. You even have an ls6 intake stock. Id invest in some heads and cam on top of your ls1. Would bne way less money and make a ton more power.
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1998 Firebird:buncha parts thats used to make it go fast..... not so much anymore. 
BAAAAAA!!!!!!
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