your gonna have to custom build a setup for the '94. 89-91 se's and 89-94 gxe's use a different engine though...the vg30e that is the same engine as the 84-89 300zx, but in non-turbo form. so you could fairly easily bolt a turbo system onto that engine with used z parts. for your '94, you should be ok with a t3/t4 hybrid, but it probably wouldnt be a good idea to go smaller than that