best all in one front disc brake kit for a 65 Dart

Depends. There were never any front drums for A-bodies that were BBP. So, you have to figure out what spindles you have on your car...
so....... maybe I measured them wrong? I ordered off rockauto for my year dart, 63, and got the 10" front drums and the bolt pattern fit them. I just googled how to measure the bp and got 4.5. is there a mopar preferred method?