Use or don't use vacuum advance on distributor???????????????????

That is a hell of a lot of mechanical secondary carb for a 360 unless it is a full race build and you know how to tune it.
Set the linkage so the secondary's cannot come in and try it again.
Just my humble opinion.
It currently is set so it has to be damn near wide open before the secondaries kick in. It actually runs better when I open it wide open. I have a friend who was helping me tune it that races circle track cars and runs these carbs on them. He thought it felt like I was running out of timing. But when I set it currently I have 15 degrees initial timing with a final of 32 with no vacuum advance.