Jerry - everything under the hood was splashed with flat black paint when I got the car and it took me quite a bit of effort and more paint to correct it all - so if there is anything (or was) scripted there, its well buried by now.
As for an original spare mine didn't have an original one and you may be in the .001% of owners who have cars which still do!
As for marks in the valence area I don't ever recall seeing any - but never really looked all that hard and never had any front end parts off for any reason to make it more obvious if it ever would be..
Thanks for the suggestions though - imagine it could be some form of scheduling number but if I understand it correctly there wouldn't be much in the way of correlation between trim parts like a dash pad and front body assembly bits at Norwood which were done in different areas and divisions.
Possibly if the seats, carpets, or headliner etc. were done at the same time as the dash pad in the Chevrolet side and not split between that and the Fisher side, it might be logical that they needed to be tied into a work order number for colour coding etc. and thus such a number to assist in that..
Thanks - Randy