Biggest tire on 1969 dart

I've posted my offsets several times on here. I think my rear backspacing for my 17x8 rims is either 5.375 or 5.5, but, I have a stock A body rear with 11" drum and large bolt pattern axles. With a 245/45/17 BFG Comp II tire, I have a little room on the inside and need to trim the inner fender on some side because the Quarter panel was replaced (aftermarket) and the lip is larger than stock. my springs are stock location and no tubs, all stock.

This is why I preach: measure your car with your set up. You may have a 66 B Body rear or a 70 B body rear, or a custom D60 with discs. Th Wheel Rite is cheap compared to messing up an order for $1300 custom offset rims.