I had a junkyard magnum 5.9 that heads were never off. Just swapped cam, intake and valve springs on the motor. 2.74 low gear 904, 4.10 rear, 3500ish stall. Would run 12.20-40 on motor and 10.90 on a 150 shot. 11.50s on a 100ish shot with conservative timing. 3300 lbs
