To narrow or not to narrow

When I was putting my car together I made noob mistake. (Well I made alot of them but this is one i haven't corrected). Here is my situation.

I stuffed a 8 3/4 out of a 66 charger under the rear of the car. I knew it was wider but planned on remedying that with the backspace of my wheels, great idea right?....... One problem, when i took the measurements to order my rims I did not take into account the profile of the tire. So now when I hit a decent size bump i get some tire rub.

So here are my options
1. Get new wheels and tires.=$$$$- really this is just a band aid.
2. Get a correct A body housing + axles or narrow the ones I have to fit
3. Narrow my housing.

Just looking for your opinions.