Basic Items for high HP: I'm sure I left stuff out but that's the package off the top of my head.
Hardened Pushrods - DI
Crower rods - DI
Big DIIC - DI
Header's - DI
Billet Intakes - DI
Up Pipes - HyperMAX
Pistons and bowl work - WOP
Hard Block engine block - WOP
Balanced engine...