If you want more, the factory performance gear was 3.23's. Assuming you have an 8 1/4 rear that would be 3.21's. I can't remember what is in between. A Sure Grip would be nice. Next would be to swap a performance electronic distributor setup similar to a 73 340 so you could set and vary your timing. See Hailifaxhops. You could also swap to a 73-75 Carter 318 2 barrel carb and ditch the lean burn stuff. Sounds like a real nice highway car. Next would be a cam and double roller ting set. and a 360 intake and TQ. See, it gets crazy fast... Good Luck.