90-93 they had difference fuel rails and the plenum for na and tt were the same 94-96 they had the plenum changed to suit the j30 so there are the bolt holes for the throttle body spring plates like this HERE and the different fuel rails in 94-96. Other than that I dont think there are any differences
Kai 14.765 @ 92.22m.p.h. #4 in 2002 on Z32racing.com in NA drags (206.4 RWHP)