1972 Charcoal Vac Canister.

I just went through this, I believe the '72 and '73 canister versions have a different number of hose connections (3 vs 4). I could not find a '72 version, so went with a '73 (I also found a '73 carburetor which has the proper '73 hose connection in the throttle plate). I hope this helps some.