I’ve run 15x6 with 4” backspace with 245/60/15 in the front of my 68 Dart
Without mods, it will rub bottom front fender corner.
You have to really push out the bottom of front fenders. You can do that with redrilling the fender support rod at the bottom of front fender. You drill the hole 3” or so forward and it will push out the bottom of fender.
How can you run a 245 on a 6 inch rim? I thought 205 is the maximum size recommended to run on a 6 inch rim? I do like the idea of pulling out the fender a little with the brackets.