10” Drum Brakes Options for A-Body 8-3/4 with Moser Engineering BBP Axles

My ‘71 Duster H-code has a factory-spec 8-3/4 rear housing measuring 52-5/8” flange to flange. The previous owner replaced the original SBP axles with Moser Engineering axles with RP400 O-ring type green bearings and 5 x 4.5” BBP. The brake (axle) offset is 2.36”.

Previous owner also replaced the original 10” drum brakes with a Wilwood 140-0260 forged Dynalite drag race rear disc brake kit, which has NO parking brake. I NEED a working parking brake in order to pass the local annual vehicle safety inspection, which a requirement for the annual vehicle registration. Wilwood doesn’t have a retrofit emergency brake caliper or an internal parking drum brake kit to fit this particular drag race brake due to clearance issues. So this Wilwood drag race brake kit needs to go and be replaced with either a disc brake with parking brake, or a drum brake kit.

Cass at Dr. Diff (he’s the best!) said that his 10.7” rear disc brake kit has a parking brake and will fit my 2.36” axle offset. He also said that his 10 x 2.5” drum brake kit will fit but that kit is out of stock.

I’m tryna keep down the cost of this parking brake swap-in. Before I sink $700 into Cass’ rear disc brake kit, does anyone here have experience with or advice for me on which Mopar 10” rear drum brakes assemblies might fit my BBP axles with 2.36” offset? Ernie at Moser Engineering speculated that B-body drum brakes might fit. And what about ‘73+ Duster rear drum brakes (BBP, unsure of offest?) Thanks FABO Nation.