[402Bowtie]

72 Jimmy
2S516332 = TBD (post 299, Jimmy)

72 Chevy
2F138542 = TBD (post 299) another 2F1 serial number that isn't a Blazer or Suburban. Has me curious...Wondering if any patterns will develop.

70 GMC
AZ58225 = 7/70 (post 299) on the paper you can see a 7 for build month.

70 Blazer
0S118657 = post-10/10/69 (post 299, Blazer) 10/10 engine build date

72 GMC
2Z503349 = pre-11/19/71 (post 299)