4000 hahahhahhhaaah your dreaming spend your money on new brakes and shocks and seat belts and a good l28 wood scare you . most pro shops charge $100 per hour for conversions so if you can not do it your self it will cost you around $20000+ to do the job .I don't do crap if it gets a hot motor it gets brakes wheels suspension and fire ext, etc. some cars leave the shop with 500kw+ at the wheels and bills that can see $100,000 be real with your budget .make it safe first.....i don't mean to be hard I'm sorry if I'm sounding that way but the grate thing about the z is that with some hard work you can fix them your self. and with help from the forum there is some grate people out their that will help you fix any problem that will come your way