Tuning the MP 360/390hp

Distributor is apart looks like advance is adjustable by loosening two screws. I was getting 12 degree initial and 36 total

The thing about setting the initial timing is I can put 45 degrees in it before it starts kicking back. I'm assuming this is probably beyond the preferred total advance and would be really bad after the 24 degree advance kicked in.

Maybe I should try setting initial with the vacuum gauge.