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Old 03-04-2008, 07:23 AM   #2
PhilaTruck
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Join Date: Oct 2003
Location: Phila, PA 19130
Posts: 1,486
Re: Best pistons for vortec heads

Here, this may help.

Comp ratio calculator
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83 GMC 406 th400/3.73 Eaton Truetrac posi, headers, x pipe, & racePros. Tubular control arms, lowering rear springs, caltracs. Still ugly, but getting built right, although slowly

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