.3728" stem. 1.875" head.
6.0L / 364 OHV V8 16V Buick 4.125" Bore 57-61
GM
6.6L / 401 OHV V8 16V Buick 4.1875" Bore 59-66
GM
7.0L / 425 OHV V8 16V Buick 4.3125" Bore 63-66
GM
GM364C-BU | 6.0L / 364 OHV V8 16V Buick 4.125" Bore 57-61
BUICK
GM401C-BU | 6.6L / 401 OHV V8 16V Buick 4.1875" Bore 59-66
BUICK
GM425C-BU | 7.0L / 425 OHV V8 16V Buick 4.3125" Bore 63-66
BUICK