Ron,
Regarding compression readings: I don't remember what compression readings an 8.0:1 351C had, I don't think I ever had to take compression readings on a 351C.
Regarding the distributor: A vacuum line from ported vacuum to the advance canister is a starting point, and I know for sure it works just fine on a '73 - '74 vintage 351C 4V (Cobra Jet). Ported vacuum will be found at the nipple that sticks out of the side of the carb/metering block. The vacuum nipples on the carb base (throttle plate) are manifold vacuum.
the cowboy from Hell
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