I put the pertronix flamethrower in mine and the first thing I noticed was easier cold starts. Starts better hot and the engine runs smoother. The pertronix is fairly cheap and an easy bolt in unit, only beware is they can die without warning....like all modules.
Other option would be to build the Buick v6 dizzy that's explained here:
www.6066gmcguy.com/hei.html
Another option is to get a dizzy from HEIDIZZY on Ebay. Currently I don't see any on there.
I ran stock points with a 45K pertronix coil and it didn't take long for that hot coil to fry those points.