245/60/15 tyres on 69 Dart

Would 245/60/ r15 tyres fit on the back of a 69 Dart without having to roll lips or modify the body in any way? Or would I be better going for 235's?

I am planning either a stock ride height or maybe a 1" drop

I need as much rubber footprint as possible as I am installing a 425hp small block backed up by a 4 speed:glasses7: but I DO NOT want to alter the bodyshell in any way