Well, I finally made the plunge and bought one of those expensive 1100814 alternators for my 6A Norwood built 68 Z/28. It was the only significant piece on the car that was not a correct original and had really started to bug me so I thought it was an appropriate use of my tax refund this year. I bought this unit (dated 8C22) from Heartbeat City which is a company located in Shelby Township Michigan (just north of Detroit). They stock a lot of rare and NOS parts as well as the usual repop stuff (http://www.heartbeatcity.com/store
They indicated to me that this alternator had been rebuilt by John Pirkle but no paperwork was provided to that effect. It is certainly a nice looking unit and the stamp looks right to me. I have included a pic of the stamping and would appreciate any comments on the authenticity. The only thing that bothers me is the back half of this unit. There is an extra threaded hole that I believe was introduced in 1969 to support the change over of the alternator location to the right side. After paying big bucks for this restored unit, I am not thrilled with the possibility that my 22 Mar 68 unit has a 1969 back half! Am I correct in this interpretation? I have two other 1968 alternators and a 69 at home to compare and neither of my believed original 68s has this extra threaded boss while the 69 does. The pictures attached show the differences. In the end, changing the rear half isnít a big deal (I have a spare without the threaded boss) but I would appreciate confirmation as to what is correct before I make the change.
Finally, is the CS code marked on this correct? I thought the 814 alternator had a CK code in 68?
Thanks all for your comments.