FBO or MSD what do you use?

Wanting to upgrade the ignition system on my '70 Duster 340, stock bottom end and heads, flat tappet hydraulic cam ?????, 625 cfm AFB, Performer RPM, TTI's, manual reverse pattern 904. Many mods to come in future and want a system that will cover anything in the future. I was pretty confused before I ran across this thread but now I'm only REALLY confused! HELP