Brake shoes help (8 3/4 BBP)

Okay - check it out. I found the receipt from the Moser axles. They appear to be A8000, 30 spline, and listed as "28 4 1/2 Mopar," although I suspect they are actually 27 13/16." Although I can find nothing online to show actual specifications for these axles, I found this FABO ad:

"$900 for A Body 8 3/4 Housing and Axles 5 x 4.50 Bolt Circle with Back Brace, perches set up for Super Stock leaf springs, New Moser A8000 27 13/16 inch axles, New Timken Bearings seals and adjusters, 10 x 2.5 brake backing plates and hardware, and flush mount drain plug."
[SOLD] - MOPAR A Body 8 3/4 Housing and Axles 5 x 4.50 BC with Back Brace and Drain Plug

The bearing package it came with included:
9400M Mopar/Dana/Axle Bearing
https://www.summitracing.com/parts/msr-9400m/applications
and
8002 1/2-20x2" short screw in studs
https://www.summitracing.com/parts/msr-8002

Does any of this information give an answer?

Dumb question: if I pull the axles (that part is easy) and check the fitment of my 7.25 backing plate and it does NOT work, can I put the axles right back again or do I need to get replacement seals or parts in order to do it right? Or, I guess I'd have to put them back if it DID work as well!