Meant to get back to you sooner. The very top of my cowl tag says "03D". The rest is similar to '67 (I think)...year, body style, plant location, S/N, interior trim code, paint code.
The BODY BROADCAST sheet prod date is blank, but the sequence says 035. On the back of the BODY SHOP INSPECTION sheet are some of the option codes/descriptions (including Z24). In the lower right corner of that back side is printed: "0253 03-27-68". Also, written in ink: "431". The car was delivered in mid-April '68.