Quote:
Originally Posted by Classic Bowties
If working on a 72 model K/5 (per your thread title) the fuel fill cap should be a pressure vacuum (non-vented) gas cap, by design the tank doesn't vent through the filler cap in 72 on the blazers. If needing a correct 1972 fill cap, we have some 72 specific GM NOS stainless double ring "pressure vacuum" gas caps available in the below linked parts board f/s thread, am pretty sure that we have a 72 vapor canister and mounting bracket setup pulled ready to ship also. Have a look and let us know, Mel 
http://67-72chevytrucks.com/vboard/s...d.php?t=837726
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Appreciate it, I’ve got a canister and may possibly need the bracket. When I tore this beast apart I put all of it somewhere, but still not sure yet if I’ve lost that piece. Time will tell. I’ve got the cap and filler and all of that stuff. Mostly figuring out if I should be using the factory vent/emissions setup
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