The big block fenderwell header car uses the 165/80x15s on a 15x4 rocket wheel.
The protree car has a tiny front wheelwell, so the short 23"frontrunners look okay, but thats immaterial, cause they are neccessary against a pro tree.
The real tall tires are on the front of a 62 savoy (giant wheelwell) with the splash panel under the front bumper cut for tire clearance. What might prove to be a problem is the one header tube on each side that runs through the fenderwell.
