1970 Dodge Dart w/(73 dart rotors/5x4.5") Front wheel and tire size combo "?"

Hi, I have a 1970 Dodge Dart Swinger 408 that I converted over to 1973 Dodge Dart Disc Brakes and now Has the larger lug pattern (5X4.5). I need to find a full set of rims and tires for this car, but I need some help with dimensioning for the front. It will remain stock ride height in the front, so there is no issues with lowering or rubbing there. I did have cragar fluted rims all the way around on it before; 15X7's 4" backspacng, with 205/60R15's on the front (any taller of a tire and it would have caught the front corner of the fender) and 225/60R15's on the back. I never liked how short the front tires were on this car (mostly due to the fact that I have headers and they used to scrape everywhere) , and I ended up taking them off and changed them back to body color steel rims that measure 15X6 and they have either 3.5 or 3.75" backspacing. On these steel rims I am running 215/70R15's all the way around, and the front tires to the front bottom fender lip are VERY close and may slightly rub once in a blue moon. (although with these, the headers do not scrape anywhere at all)
I want to find a 15X6 rim for the front that has 3.5-4" true backspacing, or a 15X7" rim that has 4.5"+ backspacing (preferrably a cragar ss or something close to that style), and possibly still be able to run a 215/65R15 or a 225/60R15 on the front. Does cragar make anything to those specs?? 16's would be cool too, if I could get the correct dimensions for rims and the same height and width tires...
Please Advise!
Thank you,
-ANTHONY