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exactly, LT1. I'm talking about a gen1 with HEI. you've said it yourself, opti it a very accurate spark system. HEI, ehhh not so much, at least on its own anyway. having higher compression doesn't help with high rpm detonation either. LT1s also have reverse cooling to help keep the heads cool to avoid that. If it wasn't for the piss poor location of the opti LT1 would be the way to go. its all good though. build, break, repeat right?
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2000 Tahoe Z71 5.7
1982 Z28 Pacecar 305
1999 S10 
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