i need advice on what internals to use???

i am just about to completely rebuild my head…port and polish, bore, the complete package along with valve trane and pistons and rods etc…do u guys have any suggestions as to what is the best and strongest…cams? valve springs/retainers? rods? pistons? and is an oversized throttle bodie worth the $300-$400? i currently have an intake header exhaust intake manifold and ive already upgraded my whole fuel system and ive got a stage three clutch bc i needed one and decided to just do it while it was getting done…its just waiting for the power…thanks a lot for any suggestions i really appreciate it guys…
tim