I've been following this and other similar threads on ignition for some time now. I switched from points to a hot spark about 6 months ago and noticed improvement with a more consistent idle and better acceleration. First thing was to get the carb and timing as spot on as possible. I thought this was as good as it would get, idle was consistent and response was decent, but I'd still bog down ever so slightly.
I recently purchased and installed a Mark Ten B, CDI ignition, I know "Old Skool", but it's made things better still. Car starts on a 1/4 turn in the morning, instant smooth idle and performance is best I've ever been able to dial in. Picked it off of Craiglist and installed it in about 30 minutes, easy-peasy. As good as an MSD or Crane, I dunno? But I've got something that works for less than 1/3 the price of the other two and the changes I've made can be reversed quickly and easily if something goes down.
Again, the FAQ has been invaluable in helping me figure out the best combinations and setups.