How rare is a GA4 paint code demon?

i recently purchased a 72 demon 340 car 4spd and it has a GA4 light gunmetal metallic paint color from the factory. The previous owner passed away but the wife found papers on the car from when he purchased it a build sheet and the missing fender tag. I bought it to restore to any color and thouhtit was a light blue. But now that I read the description of the car fromrhe paper works when he purchased it. Says it was made in July 28 and could be the last 340 demon built. Also factory ordered and special paint. Was wondering how rare that paint code is especially on a 340 demon? Production numbers? I'm thinking this could be a one of one car because of the big things like a 340 demon 4 spd car with light gunmetal metallic factory paint and was ordered with heater delete. It has other rare options but I believe those are the rarest to mention to possibly make it a 1 of 1? I'm sure it won't raise the value. Just would make it a cool car to have with those facts if anyone knows the production numbers for at least the engine trans and paint ? Let me know. Never heard of that paint code until I bought the car and couldn't find much on it thanks