Dang Kevin ...You're just not catchin a break with that IMP..Sounds like it needs a complete O/H..with better pistons..,, then why not just stroke it, as pistons come with most kits, While you're in there a better cam , then some better heads while you're doin it , $$$$ Why not $$$$$$$$$$$$$..you know how it go's...Good Luck..Larry
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