One more interesting tidbit I found in there about VG30 transmissions, sounds like the z31 turbo gearbox is a somewhat desirable box for RB folks. Also "bakkie" means pickup if anyone is confused.
VG30 bakkie box,300zx turbo and RB25det (fatbox) are all the same gearboxes except for minor differences and the different bellhousings Between VG and RB. So if u have a VG30 bakkie box u actually have the expensive RB fatbox but with the incorrect bell housing. etc.
RB non turbo gearboxes (thin box) (skyline R30,R31,R32,R33) are all the same as the SR, CA, KA, L series(6cylinder) Z24(bakkie box) there are minor differences here and there like length and bell housings etc but still the same box in the end.
Jordan B