Vacuum advance removal, is it possible?

"Back in the day" we used to braze or screw/ pin stock advance plates to do this. I have not researched this in awhile, but it seems to me (the old Direct Connection?) used to make replacement breaker plates to eliminate the vacuum can.

I don't know if lean burn parts will work. Not only do they not have vacuum advance, they don't have mechanical, either.

If you remove the vacuum, you'll have to take steps to stabilize the advance plate, as the vacuum can helps hold things in place

You'd have to check "rotor phasing." Just Google this, lots of info. You will want to check that the rotor is centered on the cap tower contact "when the spark happens" by using a junk cap with a hole in, and a timing light.