tire sizing

what are the largest tires you can fit under an A body 66chevelle without modifying the frame and inner fenders ?

y would u want big rims on a classic muscle car any way?

15 x10 with a 5 inch backspace , i have a 28 tall 11.5 wide slick on my car and it clears perfect. but that is in a 70 chevelle,but still a a-body .P.S. kyle0316 because you can.