I still can't decide.Which distributor would you use?
One of my favorites is an earlier than '69. I bought one one from Mark A. many years ago, rebushed and with a Pertronix already in it. I don't know that he still does that. Then I ran a Big-Cap 60 series with a new single diaphragm advance unit. That's a very good dizzy but requires the dented side cover to fit and I don't like the hold down bolt. Just recently put in a '76ish vacuum advance with Pertronix. I like the octane adjuster...
So, right this minute I'm running the same dizzy you have. I'd put a Pertronix in yours and run it.