I checked the CRG web site and found the 1967-1969 end-of-month vin report.It says Nor numbers are... end of may 68 vin# 465482 and June 68 482588..... That would make my 468959 a June 68 build.I think the CRG should look in to this and correct it.
http://www.camaros.org/geninfo.shtml