So at this point it looks like I'm getting a late 90's specialized frame for my urban assault bike. I'm 99.99% sure these bikes never had disc brakes as an option, but rather they would have used V-brakes. However, it seems that I can find disc brake wheelsets for cheap such as these:
As well as numerous others.
Here is where I'm confused: Where does one mount the brake caliper? Can I use it on any old frame as long as the wheels are compatible? Can I use normal cables and brake levers for these?
I don't need them really, but I just figure why not.