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Re: 7 bolt girdle
Most of the higher hp applications we "pin". This helps provide a positive center for the caps when assemblying the motor, and also helps prevent the cap from pivoting or "dancing" on main studs.
Most of the 7 bolt motors I have experience with have warped girdles. They are a pita to line hone, but I perfer the "interconnected" design.
Thats why we bush/pin the most 4g63/4g64 motors we do (or atleast recommend it).
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My street car runs low 11's and my race car's personal best is a mid 11....
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