Went and did some research. Didn't know they came in so many different models.
R32 Models:
Stolen from wiki:
GXi Type-X - 1.8 L CA18i I4, 91 hp (67 kW)
GTE Type-X - 2.0 L RB20E I6, 125 hp (93 kW, 152 N m)
GTS Type-X, S, J - 2.0 L RB20DE I6 155 hp (115 kW, 154 N m)
GTS-25 Type-X, S, XG - 2.5 L RB25DE I6, 180 hp (132 kW, 231 N m)
GTS-t Type-M - 2.0 L RB20DET turbo I6, 212 hp (158 kW, 263 N m)
GTS-4 - 2.0 L RB20DET turbo I6, 212 hp (158 kW, 263 N m)
GTS-4 - 2.6 L RB26DE I6, 225 hp (169 kW, Autech Version - auto only
GT-R - 2.6 L RB26DETT twin-turbo I6, 280 hp (186 kW, 368 N m) also NISMO, V-Spec and V-Spec II variants.
AWD was only avaliable on gtr and gts-4.
I want to know which motor he had to start with. I can definatly understand the switch to a JZ if he had anything lower than a 2.6 turbo.