63 Dart rear axle relocation.

Puching it back is only needed if you are going to run a very tall tire much over 28". That is only so the tire will not hit the front of the wheel well. If nothing is hiting I would not move the axle back any as this will only take weight off the rear end and change your front to rear weight distrubution in a way that will only hurt traction.

Just a thought for you. If you want to center it I don't think it will take more than an inch to do it. Just measure from the tire to the wheel well lip on each side.