Viper SRT10 rims on a 65 Barracuda?

not all of them are six lug. Only the last 2 generations have the 6x5.5" Bp.

As for the ops initial inquiry. My best suggestion would be custom axels with viper brakes. Since funding apparently isn't the issue

Since all vipers have six lug wheels, I think the OP was referring to the viper style of wheel and should have said as much, because no viper (all gens) have 5x5.5 bolt pattern. That size is probably from the truck.