Help with SPD date

Hi guys,
I have a 72 Demon 340 that needs the fender tags replaced. I think I figured out everything on the tag from what was still original to the car. the one problem I am having a hard time with is decoding the SPD. because my fender tag is like swiss cheese, it kind of looks like 802, but have been told that is not right. i tried to look at the door sticker but that is really faded. Not sure how else or what else to look for. What parts on the car would also have production dates to go by? This would give me some type of date when it was built. Here is my fender tag and door sticker. I also read that because my dash gauges has a seat belt warning light, that it was a mid to late 72 build because of legislation that came in at that time. Any help is appreciated. Thanks.

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