69 Dart Wheel offset

In factory wheel wells, 275 is about it. Your stuffing a 10inch wide tire into around an 11inch space. Trimming the fender lip can gain you a bit more, but its tight. Offset can depend on a few factors with the axle. I'm having to use 5inch backspace 15inch wheels to work with my mods, which includes springs moved in, Dr Diff 5x4.5 axles and rear disks.