MSD distributor tuning

No I have 15 initial and another 15 Mechanical. 30* total. Will not go higher until vacuum is applied then goes to 50*. I replaced the blue bushing with the silver and I got more total timing now, from 44* with vacuum advance. This is why I think the heavy spring may be holding me back.
Get rid of the vacuum advance, for now. Plug it off. Get the initial and mechanical figured out. Then add the VA after that is done.