Thanks,
I spoke to an engineer... I can leagally put anything in it up to a 2.3litre turbo or supercharged as long as i have disc brake front and rear. (vented front) wen i change the box thats a plate as well and so is the diff. (even tho the box is staying auto) I was suprised to find out u cant leagaly change the stud pattern. so there goes any idea's of switching to 5 stud. I'm just gonna have to go on a brake hunt soon. the only thing i'm worried about now is will an auto rwd 4age box (if there is such a thing) go on a mr2 motor?... I can't seem to find that info any where. As far as i can see the only prob would be if the flywheel bolts are different patterns for the mr2 to the levin/sprinter/corolla.