Wheel question/Help

[DRT77]

Hello I'm looking to purchase Magnum 500 wheels for my '68.  I found a set Vintiques 54 Series Magnum 500 on Craigslist brand new/never mounted.  I just need to verify the size will work before pulling the trigger. 15x7-5X4.5 (4.25 backspacing) product number 54-5712044.  I called the local tire shop and they are concerned with the backspacing especially sense I just converted the car to disc brakes.  I'm not sure what to do and figured I would ask you guy's.  If these wheels work what would be the best tire size?

I currently run 14x6 5x4.5 (Not sure what the backspacing is) Torque Thrust.

Thanks,

[polywideblock]

                      someone else will chime in, but I think there was a problem with the wheels from them(vintique )

              something about the centre locating ring being the wrong size 

[303 Mopar]

What size rotors do you have? 11.75" is the largest that will fit on a 15" rim.

[DRT77]

I think the center ring line issue is what the tire shop is concerned with.  Rotor size is 10.5" 

[MoParJW]

Not sure if this helps, but this is what I know 

Those wheels are lug-centric.
WV says they don't guarantee the center hole is exactly 100% in the center of the wheel, so ideally you should balance them on the wheel lug holes and mount them on the car without a spacer ring.

I have the same dimension wheels for the front of my car, they fit nicely, I do have drums however.

You may want to do a little search or wait for other opinions, iirc some people had issues with the quality of these wheels.

[DRT77]

Thanks to everyone that replied.  The owner of the wheels agreed to let me do a test fit if he doesn't sell them over the weekend.  Also gives me a chance to see if the wheels are nice enough to put on a MOPAR