318 Engine stumble

I’ve been working on this lately and have made some headway.
I jetted up to stock Holley specs. Went from 60-64
The lean spot is mostly gone.....
The vaccum is still 20

I’m trying to total time the the car now.
I set it at 36° and had to rev it to 3600 to get that to line up with the 0 mark.

37° and 38° never did line up with the zero mark no matter where I rev it.

Does this mean my total timing is 36° at 3600

This is the gm HEI Skip white distributor. How can I get 36° to come in at 3000
Is there some sort of limiter I can put on the advance plate?

I’m not exactly sure how this works.

To see where the timing was at 3000
I set the timing light to 34° and that was 3000rpm
35° is 3300

So 36 at 3600 is the same as 34 at 3000
What is my total timing?