Cast. 5/64 5/64 3/16".
6.6L / 400 OHV V8 16V Pont. 4.120" Bore 67-79
GM
7.0L / 428 OHV V8 16V Pont. 4.120" Bore 67-69
GM
GM400C-PO | 6.6L / 400 OHV V8 16V Pont. 4.120" Bore 67-79
PONTIAC
GM428C-PO | 7.0L / 428 OHV V8 16V Pont. 4.120" Bore 67-69
PONTIAC