Good eye fastbroshi. I don't recall what year, but it was an eBay purchase. Heat shield doesn't fit unfortunately. It's pretty tight in there. The plan for the heat shield is a pairing of homemade aluminum sheeting (fabricated) and adhesive backed heat shield (the kind you can put on the inside of body work.) I've tossed around the idea of corrugating the aluminum, but I doubt I'll even need to do that.
As for the hot glue...I began mocking the tank up by trimming and fitting cardboard sections up against the bottom portion of the tank (I already trimmed the top half off.) Gluing the pieces up as templates, I was able to determine the remainder of the tank that needed to be trimmed, and how the assembly should go. I was lazy (obvisouly) and didn't clean anything off ANY of the metal surfaces. Not paint, not clearcoat, not hot glue, not rust, not anything. I just turned the welder to max amperage with .030 fluxcore (ran out of gas) at mid-range wire speed and went away at it. I'm planning on (once it is welded tight) flushing the inside with a tasty menu of strippers (chemical ones, not pretty ones) and then doing a POR-15 tank seal kit.