Initial timing

Rag,
[1] Thanks for the rt click info.
[2] No harm whatsoever Teeing into the choke dashpot. At the carb end, it connects to man vac. You could add ten devices if you wanted, you are only sourcing a signal.
Many engines use a vacuum 'tree' at the rear of the carb. For power brakes, transmission modulator etc that require man vacuum. Chry used to do the same thing except, the vac was taken from a manifold runner, often for the brake booster but with smaller nipples for ancillary equipment that was vac operated.