Moser Rear to Narrow or not to Narrow?

My 67 barracuda is mini tubbed with a stock length rear housing.

I can fit 12.5" wide tires witha 7.5" backspace.

My wheel opening towards the front of the wheel well is moved forward 1.5" for taller tires otherwise it will rub.





I actually am looking to find a narrowed rear for mine somI can run a deeper dish.