72 GMC
2A501474 = 9/71 (post 302)
68 chevy
8A163982 = TBD (post 302) currently the last 8A truck on our list
70 chevy
0Z122653 = 11/12/69 (post 302)
69 chevy
9Z873496 = 06/24/69 (post 302) 175th day of 1969. Similar to post 290. I read a thread where someone suggested "DD" stands for "delivery date." The way the plate is stamped, the factory would have had to have stamped it (unless the dealership re-riveted it with correct rivets?), so I'm counting it as a build date until someone more knowledgeable can explain the process.
72 Blazer
2F181311 = 6/72 (post 302, Blazer)