Pop pop on exhaust side

Ok my friends, I took a moment and used a piston stop tool . I rotated my engine by hand till it touched the piston and stopped. Made a mark on my balancer, then rotated it backwards and made a mark on my balancer , and well what ended being in the center is the top dead center mark I was using. So it is absolutely confirmed my markings are accurate. That being said the pop pop goes away above 45 advanced or more. It seems to hit a sweet spot after 50. Idling around 700-800. The vacuum reading is like 14 up there.

That sounds ridiculously advanced