Welcome to LS1truck! Sounds like a cool truck--but WE NEED PICS!!! Good list of mods planned... Along with that slightly built tranny, I would throw on a 3000 stall. The heads are a great idea. Either the CNC'd 317s or the 243s...they will probably be at about the same flow rate when the final $$$$ numbers tally up. The roller lifters and rockers are not absolutely necessary right now, but they are a decent idea if you are going to raise your CR with the heads.