Wide Fronts on a 68 Dart
Perfect. Luckily I will be running 3 piece wheels and can always go wider later. Is 18x9 widest without tubular uppers?
Depends on the offset and tire width. I have 18x9's with my 27mm offset and 275's, and my rims hit the stock uca's at full lock and suspension droop. So my 18x9's didn't even work without tubular UCA's.
But, that also depends on the steering stops on the lower ball joints, and those vary a bit depending on the manufacturer. I compared a bunch of the old lower ball joints I had and found that the steering stops, and even the angle of the steering arm, were a bit different on a lot of them. Which of course means that what clears on one car might not clear on another and vice versa. The steering stops on my current lower ball joints are pretty small, so there's a lot of steering range and I think that caused my issue. But it was very minor interference, I might have been able to stay with the sock UCA's if I'd used a thicker spacer and taken the offset out to 25mm. It wasn't much at all.
And of course if you went with 255's up front you could use 18x9's with a little less offset, which would give more clearance.
But I think it's safe to say for 275's an 18x9 is the max for stock UCA's, and even then some adjustments might be needed depending on the suspension parts and alignment.
