I dont think u'l be to far off the power figure u want with what u list there buddy, once built and runnin get it in to a reputible tuner for a set up. Plenty to choose from on here ,
Yeah a t34 or 36 will great for what u want they'll spool up nice and quick and produce plenty of punch .
Not sure bout ur question on 4x4 vs 2wd heads but im sure if u wait ten mins u'l have an answer , wait another ten and u'l have it confirmed and the history of why .Lots of very clever chaps and chapet's on here , Once again good luck and get a build thread started so any probs you encounter can be answered and sorted nine times out of ten before you spot em. Cheers

Ally