Interesting conversion and good opinions for and against. Since the car I am building still has the original drum brakes, shoes (whats left of them) hardware etc everything will need to be replaced either way. I plan to drive this car a lot, and live around roads fun for spirited driving. I think since I have to spend a lot of money either way I will try rear disc on this car and keep the drums on the other one (all new system with NOS shoes, drums, hardware etc. (Plus I have several boxes of NOS shoes to support that car for a couple of centuries, plus another set of NOS drums)). I really dont mind the expense of the rear set-up, its a drop in the bucket compared to the rest of the build, I just didn't want to waste the time if no advantage is gained or even worse perforance (junky aftermarket systems etc). I appreciate the pros and cons on both sides, lots of great information on this site.