Can You Put a 67 Non Vented Tank in a 72

[PbFut]

A little other info....The 72 C20 and GMC C25 did not have a vented tank or canister, Calif, or Federal.
Keeping the tank a good idea but storage is dangerous unless you clean out very well. Some of the tank sealing products work quite well if you take your time and do not cut corners. The vapors are the issue. Although probably not the best, I filled all 3 of my tanks with water to displace all vapor and gas. Then did the needed mods and repairs, including welds, then did the recommended steps of the sealing product I used. Can't recall brand but final results were the best I could ask for. Also JB weld works great for pin holes. Had a couple on my crappy welds. One of the saddle tanks was so bad I had to cut two access holes to get inside and sand blast. The welds on the hole covers was so so. I cleaned up the seam and placed some JB where I thought questionable for pin holes that may have occurred. Painted and two years later still looks great and holds without a drip. I'm sure the sealer also helped.