Dave, I have two aluminum sixes and I think the build date code is stamped in the same location as the cast irom blocks (left front corner). Either that, or it's on the right front corner. I do know that it's much easier to read, than on some of the cast iron blocks. Joe Fulton _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list