What tank do I have?

[RPBurris]

Below are some pics of the tank that is rear mounted in my 69 K20. I should note the frame is a 78. At least I think it is.... Anyway the tank does not look like anything in the LMC catalogs and I want to order a new fuel pickup and straps. The tank itself is in good shape. The existing pickup has vent lines and such for a charcoal canister that I am not using. You can also see how deteriorated the rubber fuel line was. Yikes. It has been years since I filled it up and only dropped it so I could empty the few gallons that were still in there. The filler goes to the passenger side of the bed. Thanks all for your help!