Z but he dosnt know about setting up rear ends or id let him no questions asked. He did offer to pull the rear for me and eihter have a machine shop do the gears and he would put it back up for me when they were done, but as him and i have talked VERY few people want to touch anything when you say "its a 300zx twin turbo" So we will see if they can really do the job. Seem's they can for sure.