Ok, so it's not a Cutlass body on a full size Blazer frame and suspension?
Why, oh why would you want to do that? Donk, bubble or whatever, it's just FOOLISH.
Besides, those rims and tires are like 130lbs or more... performance was not that great on the 80's Cutlass, so get ready for 0-60 times in the 20 second range....