Goto page one, and see DoriftoSlut's post. He lists all the parts there. Just read. I dont think you should have any fitment problems because the 91+ s13s came with a dohc. I've seen people run the SSA T25 manifold on a DOHC s13 and the JGS manifold with a t3/t4 without any problems. I'd recommend you buy just piece together the parts, and do lots of research.
www.ka-t.org is a great place for more info.