Since your basically starting from scratch, You'll need:
cylinders
pistons
4mil crank, welded as well as new bearings
Port match the cases
35 pwks
filters
billet basket
fast clutch
pipes
billet water impeller
Cool head with domes cut for the 4mil and your setup. ie race, pump or alky
I'd recomend a lockout and if your going to run a lockout, you'll need a cover unless your run a gigot.
Pancake bearing
Gaskets and an oring kit
We just got done putting together a fast 4mil with all the above mentioned, was well as a duneable 1-5 and it freakin rips. The power curve on this thing is insane. We run the original set of Rockets on it as well. One thing I've learned over the years of fuckin around with these banshees is that you cant short cut anything. If your going to do it, don't half ass it. You'll save money in the long run. Any of the older guys will tell you the same.