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

try something really different...?? ford 16 17" rims with wheel adaptors. stuff some big wide tires right up inside those wheel wells without rubbing.
I'm not sure I follow you????? I'm looking at Cragar's and kinda want 'em to fit the first time. I'm trying not to waste any un-necessary $$ Know what I mean? But thanks for the suggestion...