'64 Dart Cragar S/S Size & Back-spacing

I'm looking to pick up a set of used S.B.P. Cragar S/S's for my '64 Dart but I'm not sure what size fits best. The car has stock drums front & back. I've run across a set that has "reverse" backspacing which I think will make them rub on the outer wheel well, is this correct? Does anyone have a set on an early Dart with drums? If so what are the spec's. I've also found a set of 14x7's with a 3.5" backspacing. I spent the past few hours looking at old posts in the "early A" and "wheel and tire" forums and haven't run across any that specifically adress this question. Any help would be greatly appreciated. Also, if you have a good set that will work, let me know...

OK I have a 64 Dart, run 15x7s rear, 15x6 front Cragar SS rims.

Small Bolt Crager's to be reproduced!
http://www.newstalgiawheel.com/contact.asp

Newstalgia Wheel has made a deal with Cragar to produce small-bolt Cragar SS wheels in a limited run of 14 x 6 up to 15 x 8 sizes. They will be taking still available 800-281-2819

I think I went with the standard back spacing for these rims and they fit perfect. I think I was able to squeez a 235/60/15 in the rear, but the tire would have been very close to the stone guar. The outler lip area is fine, tires fit tucked under car, and there is room on the leaf spring side too.

I went with:
15x7 rear rim with a 225/60-15
15x6 frt rim with a 205/60-15 note 215 may rub on a hard turn?