Any kind, could be dual point + vacuum, could be electronic, could be what ?

I don't think I want to step up to coil-on-plug, not yet anyway.

i'm interested in this as well, although i'm leaning toward a factory distributor with either a pertronix or gm HEI conversion, plus modified weight slots.

I've never used a vacuum advance on a drag race car, I have tried them on one of my street and strip car and didn't see any advantaged to using them on the street
I do recurve my distributors to start with so I have between 14 to 18 BTDC at 900 RPM idle and 33 to 36 degrees all in by 2000 RPM
I don't drive any of my street cars on any long distance trips of more than 30+ miles either though so maybe there might be a fuel mileage increase at constant speeds above 40 MPH using a vacuum advance

vacuum advance will help mileage a tad, and has no downside when going to the track.
Cab, i'm with you on the specs at idle and all in by 2000.
like you always say : "test, test, and test some more !"
i'm also thinking of using the epoxy filled ford truck coil. [91 ish or so ? ]

only airport drags around here any more, so there will be more street "play" than track.

I just run a rebuilt factory electronic with lightweight #925B Mr. Gasket springs hooked to MSD 6al and timing controller boxes.

You can get the nylon bushings for the bottom at Lowes if you rebuild one. The originals always crack when you push out the roll pin.

Waay back in the day the Grump would set up his distributor with ever advancing springs to over 10,000 rpm. as the rpms went over 7000 the timing (with points) would start retarding (set 36 at 3000 at 7000 it was 33) why I don’t know maybe flex, coil slows down, ??? Maybe the electronic stuff handle it better now but imo it’s all about the fuel, good octane run full advance.

I got one from O'Reilly's for electronic ignition and put a different connector on it for my Crane Hi-6. I took out the locked out tall billet firecore distributor because I wanted to try vacuum advance as well.

I took out the heavy springs and put one tiny spring in it so it has all the mechanical advance at idle and adjusted the canister to start advancing at 8 inches of vacuum and cruising at 70 with 15 inches ads about 15 degrees of timing.

With my updated cooling system and firecore distributor, my water temp was about 195-200 within 10-15 minutes at 70 mph on humid 95 degree day and a richer carb tune than was optimal (leaning it made it hotter). Then trying the vacuum advance in the same weather my 70 mph cruising water temp never got higher than 180-185 after 45 minutes and I was able to lean the carburetor down and not get the temp higher and make the engine run happier and cleaner, so I don't buy into the hate for vacuum advance on performance engines.

I had to clearance my EZ heads since the distributor is lower. The distributor has a metal bushing the roll pin goes through instead of nylon like a stock one and summit and jegs and firecore sell a hei style cap for it. I haven't had it up to 7000 yet but probably 6500 and the timing checks out whenever I put a light on it

Not a lot of choices for performance distributors with vacuum advance. These days I'm using digital control on my projects. The Holley stuff uses electronics to provide a full custom timing table including start retard, high speed retard, vacuum advance, temp dependent timing controls, boost retard, nitrous retard, etc.

Another vote for
https://progressionignition.com/

Most recent purchase for a distributor as described by OP was a reworked unit from FBO.
Worked great, no problems.
Rest of the system is an MSD-6 and F150 epoxy coil.
Street strip deal, 512" RB that ran 11.30s with 3.23s & 275/60R15s.

I’d have to go back and read what Jenkins said about why the curve kept going, but electronic ignitions are far worse for RPM retard than points.

Let me know what you find out, just going by memory but that ain’t much nowadays.

LOL...I will...just gotta find my copy of his book first!!!

I run these along with some friends on the street

Pretty sure these are Firecore sold by Jegs

I can adjust the mechanical advance with the distributor in the engine - Very easy

Quality so far so good

They come with a few sets of springs and adjustable vacuum advance


https://www.jegs.com/i/JEGS/555/40504/10002/-1


https://www.jegs.com/i/JEGS/555/405...amp;model=CHARGER&submodel=SUPER+BEE