Those are one of those things that are getting into the fine tuning. I really think you would get your moneys worth investing in a a/f meter. You’d be surprised how much those little changes make. I love mine, it’s taught me a lot about carburators and tuning. My roadrunner has been a test mule for knowledge. I’ve had a lot of different set ups on it in the last 2 years. I finally started keeping track of my tunes on paper. Something I should have done from the beginning.
Vacuum six pack
850 proform (original incarnation)
850 proform ( second incarnation)
1050 proform, final incarnation ( one of my favorites )
1050 dominator, also a favorite
Mechanical six pack with 500 (4412) center and 4783 outboards that I added idle circuits too. Also a favorite