Quote:
Originally Posted by Pro299
Tim71, I went through a lot of old posts trying to answer this same question when I put in a crate motor over the winter. Mine is a 72 C10 350/350. Should be similar to your 71 except mine has only the vacuum line from the distributor can to the carb fitting under the choke. On mine, the canister is labeled for pcv, carb, and fuel tank. That may not be exact because the truck is out in the shop and I'm inside, but if you have a canister with three fittings, they should be marked with something like that.
The consensus seemed to be as follows. The tank connector is on the frame near the fuel line. That's the line that evacuates the fumes from the tank. The pcv line connects with a tee into the pcv line. That line goes into the large fitting on the carb under the fuel filter. That line feeds the fumes from the canister into the intake. The third line goes to the carb fitting on the lower right side in the front. That small line is the one that controls the valve in the canister. That is how I hooked mine up and it seems to work fine.
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Your vacuum line routing matches what I thought mine should be. The 2 remaining ports on my carb are both full unported vacuum, so it wouldn't really matter which I use for Air cleaner vacuum(temperature sensor that feeds snorkel door) or CEC valve vacuum.
Still looking for a photo of the metal hard line that runs between CEC valve and distributor.