68 gts 383 block

Nope, SO# on core support and trunk lip but VIN on block let side top rail...
On '68 's ??????? I was thinking the SO# on back top of block but I have forgot most of what I did know!! Funny how backin the 80s, 90s when I drug home so many 6bodies 9%of I found wer 69 cars 68-70 B, some 68 and few 70s.