Brass plugs.
3.0L / 181 OHV L4 8V Four Cylinder 4.000" Bore
GM
3.2L / 194 OHV L6 12V Chev. 3.563" Bore 62-67
GM
3.2L / 194 OHV L6 12V Chev. 3.563" Bore 63-66
GM, CHEVROLET
3.8L / 230 OHV L6 12V Chev. 3.875" Bore 63-69
GM, CHEVROLET
3.8L / 230 OHV L6 12V Chev. 3.875" Bore 63-70
GM
4.8L / 292 OHV L6 12V Chev. 3.875" Bore 63-89
GM, CHEVROLET
GM194C-CH | 3.2L / 194 OHV L6 12V Chev. 3.563" Bore 62-67
CHEVROLET
GM194T-CH | 3.2L / 194 OHV L6 12V Chev. 3.563" Bore 63-66
CHEVROLET,
GMC
GM230C-CH | 3.8L / 230 OHV L6 12V Chev. 3.875" Bore 63-70
CHEVROLET
GM230T-CH | 3.8L / 230 OHV L6 12V Chev. 3.875" Bore 63-69
CHEVROLET,
GMC
GM292T-CH | 4.8L / 292 OHV L6 12V Chev. 3.875" Bore 63-89
CHEVROLET,
GMC
