1975 Dart Sport Fender Decoding

The decoder I use still didn't pick up some of the codes, but here's what can be added to your results:

LL29:
Dodge Dart,Demon
2 Door Sports Hardtop

G5G: 318 V8, 1975 model year, St Louis MO assembly

D2L3: Trim - Luxury, Vinyl Bench Seat, Parchment

911: September 11 build date(that would be 9-11-74)

I would take a CLEAR picture of the fender tag and post it please. I suspect some of those unknown codes just were read incorrectly.