It depends on what your looking for. I like drag racing more than road racing, so if you want tires for just hooking up in a straight line, then I have seen 70 chevelles with 305's in the back. I think it requiers 41/2 inch backspace, and the fender lip be rolled, as well as "massaging" the innder fender with a mallet. If you just roll the lip, 295's can fin with ease. Use a 15X8 inch rim.
Ive done lots of measuring and the widest tire you can fit can only have about a 12.5" section width and you will need a 15x10 rim with a 5.5 backspace to center the wheel.I run 17x11 with 315/35/17 drag radials with no rubbing and the overall width is 12.5" wide.Hope this helps.
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