If this engine in Reuby's picture uses a computer to run both the fuel & spark, [as it must] then vacuum advance to the distributor would be un-necessary. Just run a vacuum line from the plenum or the correct port on the throttle body to the M.A.P. sensor in the computer & map the correct curve on a dyno. The T.P.S. & measured rpm will tell it when it's idling, so it will go back to the proper advance for that, no problemo.
Easy peasy. [he said as if it was done as easy as a snap of the fingers.]

If I remember rightly, my Haltech brochure says that it will accept many different inputs for ignition trigger, including the original points. [Bad idea] I presume that I could simply use my Pertronix conversion, remove the vacuum canister & lock the advance plate, then lock up the bobweight advance function to make the timing work without it wandering all over the place. [If I was to run a multi coil pack that is]
A custom billet cover to replace the distributor cap & it's all good.
Now where's the fly in that ointment? [There's bound to be one]