I'll just cut and paste what I got from PHS which was real helpful. For the couple options on my car like console and Rally Clock, the cover letter from PHS applied, but here goes: """"""""""""""""""""""""""""""""""""""""" The information on these Billing History cards can be very confussing. That is why we do the decoding for you and high-light the options and equipment for you.
Box "37" gives the axle ratio, which on your car is a "H" or 3.36:1 ratio.
The box "74" with a "2" in it is for an internal assembly operation on your vehicle and is not an option. I believe that "742" is the operation for installing seat or shoulder belts.
Information in box "34", with a "5" denotes the standard GTO engine, a 400 cid, 350 hp motor. Any item that is standard equipment will not be shown on the order form.
Plant code "P" is for the Pontiac Motor Division assembly plant, in Pontiac, Michigan.
Trim code "23" is for a Black Bucket Seat interior.
All of these options should have been high-lited on the information that we sent to you in the information package. I apologize for any confussion.
Jim Mattison Pontiac Historic Services """""""""""""""""""""""""""""""""""""""""" Reed
