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#1
03-19-2012, 09:57 AM
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Glad I could help. I would have no problem using those parts in a high performance build. Use quality fasteners, spend extra time getting all of the tolerances right, and pay attention to detail with the oiling. It will make a great 400+ HP engine for street car. What casting # are the cylinder heads?
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1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi 1969 Malibu COPO L72/M20/12 bolt 3.31 posi 1968 Malibu LQ9/4L80E/12 bolt 3.73 posi 
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