choosing the right alternator

Just rewired my 73 Scamp with American Autowire harness and is a one wire to alternator connection so my question is what alternator do I need to install in my car?
I am not smart when it comes to wiring but everything works so a big plus but every alt. I looked at said that I need a external regulator and before I do something stupid I thought I would ask you guys.
Summit has the Powermaster 75191, single wire internal regulator that puts out 95 amps. I've had good luck with Powermaster so far.