Pontiac GTO 400 Engine Block Build Up - Poncho Honcho
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Valvesprings and retainers are Comp Cams-issued. PRW full-roller, forged aluminum rocker arms are plainly stamped with the engine size, stud diameter, and rocker arm ratio. Valvetrain geometry must be fully checked on every engine with aftermarket heads, especially aluminum, because spring pads and valve placement can be slightly different compared to stock, so proper roller rocker arm tip-on-valve stem positioning must be verified. View Related Article
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