I have a 1968 Coronet 500, 383 2-Bbl,
3-speed stick. I am trying to detail the
engine compartment back to stock.
There is this funny round gizmo with
three hose connections on the right side,
near the rear of the intake manifold.
Nothing is connected to it. How should it
be hooked up?
It is an OSAC (Orifice Spark Advance Control)
valve, P/N 2844355. If it is the original,
it should be color coded red. There are
three connections, the one facing the rear
goes to manifold vacuum, the front one to
the carburetor, and the one facing the right
fender, to the distributor vacuum chamber.
See factory blueprint, below.buy online
