Very nice work! I am doing my non-A/C heater box for my '70 Challenger myself. Bought the DMT kit as well. I did the disassembly a while back and some painting of the metal parts, so I'm at the point now where I just need to apply the gaskets and reassemble. If you don't mind me asking, what did you do to get the housing (plastic/fiberglass) to look new, and how did you get the yellow part number stamp to look new? Thanks.