to JoshuaSAE... why don't you look up Endyn or Bisimoto if you only think a D can hit 215. for those boys thats a dang street motor. and yes you will probably say that " well with the money you could put in the D you could of had a B swap" chances are he wants to be different. and hell for what you could spend in a B swap you could have a D with just much power and more torque. That could probably beat that B. but yes I also know the other come back of " well thats just a stock B and the B has more potential"

to each his own!

to the O.P:
with doing a head work on the D series it really wont pick up much if any power by doing a port / polish type work. the biggest gains from the D come from a really good valve job and work around the seat. Also, if your going to stay in the All motor / small nitrous category have the bowl worked and then welded where needed so that you can get a better quench.

CJ