Ebay has your motor for 68Z - here is the vin - V0610MO, the vin # is 18N451328, and the date code is F-6 -8.

http://cgi.ebay.com/ebaymotors/1968-Z-28-CAMARO-302-MO-BLOCK-ORIGINAL_W0QQitemZ230127586845QQcmdZViewItem?hash= item230127586845

what no pics? how does one expect to sell that?

David is a Great guy and also a member here on Team Camaro,,And sure he will provide anyone with any info about the block that he knows.
Maybe the mods can move this to the tag team section.. Frank