What Are You Doing To/With Your Car Today?

OK, that's a great rear axle.

Here is a post on "Recent Posts" here on page 3 right now.

Junkyard Swaps: Rear Brake Options for 8 1/4 and 8 3/4 axles.
By: kern dog

You can read through all of that to start getting some ideas. Ideally the stock drum brakes for the 8 1/4 would be ideal if you can find them.