This may be a bit over your performance aspirations, but I think this Wilwood kit is tough to beat if you’re keeping a small wheel.
I’m currently running Kore3 C5 Corvette discs all the way around, I’m happy with the performance, but I’m limited to running 17 inch wheels. If I could do it all over I would lean toward the Wilwood stuff.
I also prefer keeping a non-powered setup. Pedal feel is great, more space to work under the hood, and you don’t have to worry about a big cam killing your vacuum
https://www.wilwood.com/BrakeKits/Br...+Brake+Spindle