Mid 70's rear brakes on a '67 - upgrade

[stomper]

For the 2nd time in 6 months, the rear brakes on my 67 are giving me trouble. (Locked up. Probably lost a brake cylinder. Adjuster seems to be acting up.) This time, I figured I'd pick up a 73-87 4x4 rear axle and swap the brakes over for the wider shoes. I was told it's out of a 76 blazer. I really just need the backing plate but I'll see if I can use the hardware and drums without buying new. New shoes of course. 6 lug pattern on the drums will match my existing '67 axles. I need to take one axle out to replace a broken stud anyway, change fluid for piece of mind, confirm 3.73 gear ratio. Might even upgrade all the 7/16 studs to 1/2 as I now have 1/2 on my upgraded 6 lug discs in the front. I know the front brakes do most of the stopping but what the heck. I think this is going to work?