If you need a mechanical fuel pump, then you need to change the front cover to an LA style which means you'll need the LA water pump, crank pulleys, as well as the LA style alternator and power steering if you have power steering.
Which also dictates the cam type needed.
I knew I was going electric fuel pump, so I ordered the cam without the eccentric option.
There is a kit for the magnum cam that allows to add the eccentric for the mechanical fuel pump when using the LA chain cover.
