360 Magnum flexplate / balancing experts !
I'm a bit confused as to what you have going on, but I do know that 5.9 Magnums have extra balancing weights on the flex plates and harmonic balancers. 5.2 Magnums are neutrally balanced and have no additional weights on the balancer or flex plate.
I had to oblong one hole in the flex plate for my torque converter to bolt up to the flex plate. The torque converter was neutrally balanced for both.