Thanks for the sites. I've looked at the option of rear discs, but it's kind of expensive, and I'm kind of old fashioned, so I like to stick with original style parts in most areas. Although I could probably get better braking, actually I know I could get better braking, from a disc upgrade, I don't feel I would really need it. I don't have plans to race the car, also when I drive I'm very catious and I always leave a large gap between myself and the car ahead, so hard braking isn't needed. I figured I'd probably just rebuild the drums with stock parts and some performance shoes, and maybe use some Brembo drums.
Does anyone have a picture of the rear drums (with the drum removed, obviously)? I've done GM, Ford, Chrysler, and Toyota drum brakes before, but never Datsun.