SCC said the swap was easier on DOHC cause the power steering lines match up. IIRC, the SOHC requires some bending or custom lines.
89-90 SOHC - 140hpfunny theyre rated the same, even with different comp ratio
91-94 DOHC - 155hp94's are convertibles only
as far as the cams go, see Orion's post (its the 2nd to last post) in this threadhttp://
www.nicoclub.com/zerothread?id=79606
Ive read lotsa different things about S13 cams. But that is the first time Ive heard that explanation. Orion seems to know his stuff, so that senerio is completely possible, IMO.
nissandrift must have a early 93 model.