zgad, So is your friend with the 650hp z31 breaking the 87-89 turbo trannies? I have this set up on my 200sx and was looking for around 500rwhp race and 350rwhp street. I looked for info and this trans is suppose to be the strongest stock trans you can use. I hope it holds together..... I would like to see more info on your friends z31. I have been to the orlando drag strip and seen a z31 run low to high 10's and have been impressed, I think the car was gray. I'm putting a vg30et in my car and any info would help, like turbo , clutch , internals, cam , etc......
Thanks Dave....