8 3/4 replacement axle 5 x 4 needed

I am switching my 8 3/4 SG axles from 5x4 to 5x4.5. Just had new bearings and adjusters installed before i decided to go to the LBP. Do not even know what they are worth. PM me, and maybe we can work something out. Was in a 66GT Dart, but the drums said it was from a 72 Duster. Bought it installed in a parts car. Old Dart 66