These heads proved to work well for this 498" B-block endurance build. Made 947hp @7400rpm and 690tq@6800rpm on Best Machine's dyno.

KOS, not sure about spacers, I think the motor plate takes care of it. Best Machine could answer that.


B3 1969 Charger R/T SE, 440/727 with 3:91s running 11.07@120