That pump is useless mointed in the front, it has to be mounted in the back.
It is a 600 vac secondary....its not a tip in stumble...when I heard it, it was more like it was running out of fuel up higher in the rpms.
As far as the timing, I didnt put a light on it, I just put the teeth in the right spot and timed it by ear. Only messed with it for20 minutes or so