It's good stuff, don't misunderstand. But "most" builds benefit from more than 8* initial. I would put a light in it with the vacuum advance unplugged and the port blocked off run the engine up in RPM and see "where" it stops advancing.
What would you recommend as a good Advanced car for that particular engine? If you got the time and feel up to it I can relist it for you I know every darn part that went in that thing I felt it myself.. I just don't know all these odds and ends..