Steel plugs.
6.0L / 368 OHV V8 16V "6,9" Cad. 3.800" Bore 80-84
GM
7.0L / 425 OHV V8 16V "S,T" Cad. 4.082" Bore 77-79
GM
7.7L / 472 OHV V8 16V Cad. 4.300" Bore 68-74
GM
8.2L / 500 OHV V8 16V Cad. 4.300" Bore 70-76
GM
GM368C-CA | 6.0L / 368 OHV V8 16V "6,9" Cad. 3.800" Bore 80-84
CADILLAC
GM425C-CA | 7.0L / 425 OHV V8 16V "S,T" Cad. 4.082" Bore 77-79
CADILLAC
GM472C-CA | 7.7L / 472 OHV V8 16V Cad. 4.300" Bore 68-74
CADILLAC
GM500C-CA | 8.2L / 500 OHV V8 16V Cad. 4.300" Bore 70-76
CADILLAC
