Dave, can you show some literature that says you could get the buckets in any car? As far as I know, you could get bucket seats in the SS (standard), caprice (option) and biscayne (special order for police cars).
I too would like to see a picture of that cowl tag. 813 is black bucket seat interior the S after it to designate bucket seats with headrests. B is plain buckets and A is plain bench seat. There are others for plain bench with headrests and strato-bench too.
Possibly you misread it and it does say 16867 or it is a mistake and does say 16467 because I have 67-16467 JAN car in my list with an 09C build date and the body number is 208, which is almost 100 higher. The SS body number would be lower and 117 seems to fit in for an SS vert body. Seeing a picture of the vin tag would also be helpful.
And 4F is remote mirror.