What's involved in replacing the fuel pump cam? Should I just put an electric pump back by the tank? If so what brand/model, etc? It's still a 6 volt system.
If you're talking the 216 in the '50 3100, you'll need to remove the engine, then the pan, harmonic balancer, timing cover, rocker assembly, pushrods, then pull the camshaft out, remove the timing gear, then reassemble.
If you're not concerned about originality, you could put an electric pump in and open up the fuel pump and take the check valves out of it so fuel can just run thru the original fuel pump.
