redrilling 6 lug axles to 5 lug - brake drum interchange????

[Chuck78]

I'm having my 62 GMC's original Dana 44 rear axles redrilled to the 5 lug pattern to go with my future 5 lug disc brake swap and a set of American Racing Torque Thrust D wheels that I got a super deal on.
The axles are no problem, Babbit Bearings here in town charges $100/pair for the axles. The center registers on the axles need turned down from the 3.5" diameter to the newer wheels' 3-1/16" (I think?) center register diameter. Now I hadn;t thought of this, but if I have the 6 lug drums redrilled and use them, now I won't have the center register to locate the drums anymore! I thought I could maybe have them turn it down in a step type register, but I figured it'd be far easier if I could just find a modern 11x2" drum that would swap right onto the Dana 44 rear.

Anyone have any clue what could work?

this is what is stock, and it is listed both for Chevy and GMC (Dana 44 and GM Corporate rear ends):
RAYBESTOS Part # 2005R More Info {Professional Grade; Outside Diameter 12.375" / 6 Bolts / Not Finned}
Front; 11" X 2" Brakes
Rear; 11" X 2" Brakes

All of the newer style starting at the very beginning of the 1/2 ton 5 lug pattern have what looks like a stepped drum that is thicker towards the end, as they are still 11x2 brakes, but larger diameter on the edge at 13.64" vs the 12.375".
Not sure if the newer drums will work with the old backing plates, and if they are going to be the right depth.
The D44 is far superior to any GM Corporate rear, but no axle conversions are available, but I still want to stick with this unit if I can. Not sure if the entire backing plate would swap out with a GM rear, but maybe I could get a D44 backing plate and brake setup off of a Jeep or something if the pattern is the same? Mine bolt on with the axle bearing retainer, but I thought I had read someone having a D44 with backing plates that were factory welded on.

Photos: