69 Dart Wheel offset

So you have an 8-3/4 with LBP Axles? With that combo of rear, axle and 11"x"2 drums I fit 17x8 with a 5.25 BS and a 245/45/17 tire, so a 10 wide rim would be in the 6.25 to 6.5 back spacing. But i suggest you measure. Use a square and tape measure. An extra had helps here.