Wheel Fitment HELP!!

It would help to identify your disk brake conversion and the width of the rear axle.

Since neither of those parts is original to your car, we really can’t give you a good recommendation. If you have A-body parts then those wheels should fit, but if you don’t then who knows? Could be an 8 1/4 out of an F body. Or a Dakota. Hard to say without measurements or pictures.
All true. I’ll have to take some WMS measurements. The front currently has a 14in steely on it. I will take a picture of the front brakes and the number on the dif and see if that helps. Sorry for the bogus post.