Will Aspen Wagon Disc Brakes Fit On My Scamp?

You'll need the larger ball joint for your car if you don't already have it.

Spindles and caliper anchors. Keep the hoses in good shape if you can so you can use those as mock ups for length and routing.

Rotors, bearings, and the such can be bought new, so if they aren't in great shape...you can forget 'em.

Calipers can be used for cores so you can grab them.

Not sure about the master. I've heard of guys using them, I've heard of guys not. Same way with the prop valve.