Help tuning mystery motor?

First off, don't set power valve opening off idle vacuum. That lie seems like it will never die.

Second, you need to stop and degree the cam. There is no reason not to. You'll need to know which cam it is, but if it's on a 108 it needs to go in at 106 at the latest and probably 104 would be better.

You need to get to at least 38 total. If you can't, there are other issues like the plug is too hot or something.

Just a whole lot of mixed up stuff that needs to be sorted out before doing anything else. Finding out what cam you have and degreeing it is step one.