Thanks for the info....yeah it is kinda heavy (which is why I wanted a 240sx) but it's still possible. Its pretty popular in Japan to use a Soarer which from what I know is basically the same except for the turbos. Although there's only 1 that competes in D1 that I know of. As far as suspension, I've seen some parts for the SC and it's good enough. The main thing is I'll be really stripping it down as far as I can.
As for the swap from the auto to 5Spd, do you know if there will be a lot of fab work if any?