Application Notes: Cast iron or aluminum heads - Pro Stock Chevrolet, Oldsmobile, Pontiac Engs. - w/Chevrolet bolt pattern - 4.840" bore centers
Product Notes: Round bore; May not fit some cyl. head valve pockets; Fits Gen IV car, trk, HP block; Does not fit Gen V, VI block; 2 coolant holes per end; 3 lower coolant holes; Minimal brinelling of aluminum heads
Engine Family: Chevrolet V8 Big Block, Chevrolet/GM V8 Racing Big Block