Early Olds rear ends

I traded for a 62 olds rearend, narrowed, 4 link with QA1 adjustable shocks. It still has the drum brakes on it. Anyone know of a disc brake set up that would go on this? It's going in my 40 chev coupe project, and I have a Mustang II front suspension with 11in disc. The drums may do the job, I have a corvette alum MC I'm going with, manual set up. It has 31 spline aftermarket axles, not sure on brand, look like Moser. Also need a gear, it has 4.88's right now. Found out parts ain't cheap for them.