Im currently running a cooper tire 295 55r15 on Jegs 10" wheels and want to go to a ET street tire. The coopers are tight now so i may step down to a 275. Summit claims rim size is 7.5-9.5 rim max. Wondering if you can get away with having a 10" wheel. Any pros/cons if it does work too? Going on a 63 with mini tub , leafs and about 2" lower in rear.