71 Demon 340 Gas Cap??

I am the guy with the 71 caps for $70.00 I sold quite a few and don't know if I want to sell any more 71's. I have heard some of them I sold are going to carlisle for resale for alot more money. Two of my gas caps are already on an auction site for $150.00 each. This hurts the sale price from me for all my parts. I will post pics today of all of the different caps. 70 and back are interchangable nonvented. 71 on its own nonvented. 72-73 same but will work on later 74-75 same 76 on its own all later caps are vented 74 up will not work on 72 73 correctly. but 72 73 will work on later. Some quarters on the later cars have a deeper fuel nozzle inset and the tube makes up the difference also some slide in from the outside and some from the inside. Some use four screws and some use three. I will picture all of the different caps today if I get a chance. I also have all of the different tubes. All of the 76 cars I stripped had plastic caps if they were fold down back seat with the bent tube. I have had some with metal. But the only plastic caps I ever got were off of 76. Steve.