first off i dont know if the chasis are compatible or not.

i think the GTi-R is based off the primera platform (even though its an 'R' chasis), and i couldnt tell you how compatible they would be in either direction.

for a general RHD conversion you need to use the firewall from the clip, so if the steering doesnt bolt up, firewall doesnt line up right, etc, then i dont know what to tell u man.

question better suited for a nissan tech board.