66 Dart rear wheel openings / arches

I was going to move my spring back in the front mount box I installed about an inch to better center the wheel. The engine builder I'm using didn't like that because of weight distribution. It would make it much easier since I already have to have a drive shaft fit. That seems to be the only cost going that way.

Pettyblu, did you notice any launching change when you moved yours?

Thanks guys,
Rod