You are correct, it was set for a 727 with a 3000 stall converter, which I later changed out to a 4200 stall 9.5" Dynamic convertor.
I'm going to test it with the vacuum disconnected, and the timing set to 22 or more. If it likes it, I will modify the advance plate to narrower slots. and then experiment with leaving the vacuum on or off.
Incidentally, whats the max initial timing before it starts getting hard to start?
