Description
Larger diameter 3/8″ pushrods fit without additional clearance. This is primarily due to the fact we enlarged and widened the pushrod pinch removing that checkpoint in the entrance of the intake allowing us to design a port with a more direct shot at the back of the valve that also has a more consistent cross-sectional area and velocity profile. In addition, this head comes standard with a 3/4-inch deck, 2.125 intake and 1.600 exhaust. The exhaust port and bolt pattern are raised .250 over gm l98 head (see footnotes here), this rarely affects header or chassis fitment. If you are unsure if this is the right afr head for you, we encourage you to contact us directly to discuss your combination.
Basic package components:
100% cnc ported combustion chambers
100% cnc ported exhaust ports
100% cnc ported intake ports
3-angle radiused valve job
Bead lock intake valve, 2.125″ x 5.006″ overall valve length
Bead lock exhaust valve, 1.600″ x 5.024″ overall valve length
Pac racing springs 1.550″ od solid ler dual valve spring pac #1225, 250 lbs on seat, .800″ maximum lift, max rpm 8300-8500
8511manley 10° 4140 chrome moly retainers
10° bead lock valve keepers
Viton valve seals
Guide plates
Viton valve seals
Hardened spring seat
Intake valve seats
Exhaust valve seats
Bronze valve guides
