Gathered and added serial number information on my CJ2a for this siteÂ
http://cj-2a.com/parts_list/CJ2A_data.phpOK, I spent some time with a dremel tool, wire brush, degreaser and a box or rags, That's right, time for some jeep archeology. Serial numbers:
ACM body number on firewall gusset 56943
Frame number:64834
body number 64834
build number 64834
tailgate: obscured by bed liner
engine (original)             MC96859 , head W5 648  800378 , block z641087-L-W12A-N1-OR-N2  non clock 5-21
engine (1947 donor replacement) J129467,   (head is obscured),     block 641087-L-W3A-N-LR-N2 clock style 6-18