Check fit for correct application.
6.6L / 400 OHV V8 16V Pont. 4.120" Bore 67-79
GM
7.5L / 455 OHV V8 16V Pont. 4.150" Bore 70-76
GM
GM400C-PO | 6.6L / 400 OHV V8 16V Pont. 4.120" Bore 67-79
PONTIAC
GM455C-PO | 7.5L / 455 OHV V8 16V Pont. 4.150" Bore 70-76
PONTIAC