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Re: L29 454 Build for '63 K15 with NV4500
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how much could the CR be raised by using aluminum vs cast iron?
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most say about 1 point
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Steve
1971 GMC Longbox. Full Roller Stroker 489 w/ FiTech EFI, Chris Straub Cam/NV4500/205/D60/14B w. Grizzly Locker and 4.11's. 2" Lift on 33's
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