Disc vs. Drum

I know disc brakes are supposed to stop better after repeated stops. I've never understood why drums aren't good enough for most applications. OEM must use them for some good reason. With them, it's usually about $, but it doesn't have to be. If a car already have discs, fine. It seems like a lot of time and $ to swap to them.

I had a Challenger R/T that of course, had 11" brakes. It stopped very well. When I put on metallic shoes, it would pop your eyes out. (Even cold, cuz they were 11's, I guess.) It should've stopped well, it had big brakes.

Our 4000# (w/ drvr.) Stock Eliminator Road Runner had 10" drums w/ standard linings. (10"er's were lighter.) It ran 116 mph and we never had a problem stopping. (Even at Numidia, a short shut down track.)

Here's where I'm going: My project 74 Dart Sport street/strip car will weigh approx. 3000# and will probably trap at 120-125. Why not use 10" drums w/ metallic shoes? Firm Feel sells them. It has 9" now. Drums offer the advantage of no drag, maybe lower weight? If this is feasible, would a 10" set-up bolt up to the spindle I have? It'll probably get a Dana or 8 3/4 rear.

This all depends on the application, of course. If you need stopping power, that's another matter.