Why 944?

[yetibone]

There are a number of benifits to the P-car parts over CB's disk brake kit, but the differences may not matter if your plan is to use your Type III as general transport, and not a rice killer, auto-x, or track car.

Stronger forged rear hubs from the 944 vs. the cast steel Roto-Hubs from CB. The 944 stuff includes vented rotors, a little bit better caliper, and you can find it all in a junk yard for low $$$.

Nothing wrong with CB's stuff, just that 944 stuff looks stronger, and was designed for better performance, IMO.