Today's fruitless search for Bullitt wheels, LOL

Something isn't right. Assuming you have an A-body 8.75 rear end, you would use a .75" or 1" spacer with 245-45-17 tires and fitment should be perfect. There just isn't that much difference in wheel well space on these cars for you to run into clearance issues without having to move the springs in, i.e. there's so many others who have done this already.