My 1971 340 Duster had a scheduled build date of July 9th. It has the 72 trunk lid, bumpers, blue engine. In comparing my car with my friends 1971 340 Duster I noticed the tube that comes from the gas tank and ends up in the engine compartment are different. In researching pics online it seems in 1971 the tube ended straight and the 3/8 hose went to the three nipple breather on the valve cover. In 1972 the tube turns 90 degrees upwards and goes to a charcoal canister. My Question is, I have the 90 degree tube and the hose still goes to the three nipples breather. Could I have had the charcoal canister in 1971? Maybe the tube like other parts were already being geared up and just placed on my 1971 without a charcoal canister. I don't see any evidence of having the canister but I can only trace the ownership to the early 90s.