Hey Dan,

I'll bet you a can of NOS tire air that the 68 blocks have the SO number stamped on them over the top of the bellhousing flange, but very few (if any) have the VIN stamped on them!!

It is interesting problem, because on the 66-68 cars the fender tags do not have the VIN, so the only (2) documents that tie the entire car together are the Certicard and the build sheet. Those are the only places where both numbers appear!!

Extra points for those who can tell where the certicard was located on a 68 B-body (I'll give you whiff of the NOS air!! - giggle).

John P.