Suggest you get the HD Service manual and the HD Parts manual. IMO, much better than Clymers I've used. Parts manual is great because you get exploded views of things.
Baisley Pro Street heads
+ Level 2 Mojo.
Torq Monster Motorworks
spec'd & built, extra "Special Sauce."
142HP - 148TQ SAE / 145/151 STD. More there.
Jimmy crack corn and I don't care.