ok so im really looking hard at the second digit which i posted as either a letter S or 6, if that is actaully and 8, then the whole thing would make a lot more sense, given 1=Chevrolet 8=1968 B=Baltimore and then the 6 digits for the production line. any thoughts from the pics i provided if that 6/S could be an 8. i only mention it since 1968/69 engine vins were in a different format. but what then would the suffix code go to??