Upgrading from kelsey hayes to???

Most use the 73 knuckles. Not sure why you would bother if you have K-H discs. Have you tried better pads?
The calipers that came with car hadn't been touched in years and will need a rebuild, so I figured instead of spending any money on rusty old junk I'd spend a few extra bucks and put high performance parts if there's an option to retain my existing parts and put a bracket and better calipers, by the sounds if it i will need to find a performance caliper that fits and make the brackets myself, I was just hoping someone could steer me towards the best calipers to take the k/h place