4" to 4.5" Bolt Pattern on a 7 1/4" Rear?

Definatly do not use the adapters!!
I vote with the other guys to swap for an entire 8.25. Axles, housing, gearset, brakes and all. The whole Shebang.
There must be someone near you that has a 4dr Dart or Valiant you can use for a donor.
There are also Sure Grip units for 8.25.
Not sure if there is one available for 7.25