200R4 update

Hate to stray from the original topic, but if I wanted to use a 200R4 behind a stock Magnum 5.9 (externally balanced), how hard would it be to either procure a custom flexplate to mate the two together, OR redrill the Magnum flexplate to match the necessary 200R4 torque convertor? Anyone been down this road, or something similar?

I'm getting a 120K Magnum 5.9 that I don't want to disassemble and internally balance, and trying to figure out the best/easiest way to do this.

Sorry to step on toes -- I can start a new thread if necessary.

I PM'd UOP, but he is running a non-EFI motor that doesn't need the crank trigger windows on the flexplate. Wilcap doesn't make one either. I'm wondering if both flexplates will fit if the crank extension was cut down to accomadate the thicknes of the OE flexplate?
Has anyone ever found a solution elsewhere?