If interested, maybe temporarily give it a try and see what you think, first set up a vacuum gauge, warm it up and
just crank the distributor to 30+ at idle, then close the throttle blades and adjust the idle mixture to keep the rpm
in the same ballpark.

You might find improved vacuum at the same idle rpm as previously, and better overall idle quality.
It might even be possible to lower the idle rpm, I can idle mine down to 850 if I want to but I keep it higher
to oil the valvetrain.

Don't rev it or drive it this way as the total timing will be way too much + it will probably not crank when hot.
It will just give you an indication of how the idle may or may not be improved.
(I'm pretty confident it will help but have an open mind/would like folks to find this on their own).

If you hate it, you can always retard the timing back to where it was.