I agree, a lot if performance is to be had by having that spark come in at the right time all the way through the range.
I used to do a lot of ignition timing work with a single point ignition distributor on a 327 Chevy. I knew that engine very well. The static timing, then the vacuum, I had an adjustable vac advance on that one because I was running ported vac, my static plus the vac advance was too much at idle so my vac advance was adjusted back a little. Then I experimented with weights and springs for the mechanical.
When you get it right, it feels like you found another 30-50 HP hidden in the engine somewhere.
Most folks these days figure an MSD sticker will take care of it all.
