go for a nice adjustable fuel pressure regulator. you can up your fuel pressure 5psi or so. this will give you a cleaner/better burn and more performance in general.
however, this modification will also require confirming your A/F ration on a wide band dynomometer and use of an Apexi AFC if necessary.
"As the Z32 gets older and decreases in value it becomes affordable by lower income and often less desirable people whose tastes reflect their personality and social standing.- Marshall 17:37:05 10/10/03