Phil....
....it seems as though you think you have a choice as to which source you can
pick for the vac. control unit on your dizzy.....you do NOT have a choice.
Do NOT using manifold vacuum on a
distributor vac. unit meant for carburettor
ported vacuum because this would be an incorrect "application" (as the two
"signals"
are dis-similiar) as are their "calibrated
orifices" through which the source "signal"
is "translated" to the vac. cannister.
If you cannot operationally
hook the distributor's vac. unit up to the
CORRECT vacuum source, then "cap it" at
the dizzy and run without it. This is exactly
what we did for malfunctioning or non-
functioning vac. control units back in my
youth, anyway.
The only thing vacuum "advance" will give
you is better part-throttle combustibility
(read: better "cruise" fuel economy). Other than that, it really does nothing
for you, the motor running bascally on the mechanical advance curve anyway.
Just time the car normally and forget about
the vac. advance altogether, sir. Unless you
can hook the "can" to the correct source,
of course. Than by all means, use it.
Cap'n Bob
Basic Frog
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