Blewbyu,

Just for comparison, my numbers are a bit faint but still readable. This is the original hemi trans for my 68 RR (May 68 build).
PK2801544K 2413 0178 I had in my notes that it decoded to 6 March 1968, #178 built that day/shift.

PB100720.JPGPB100723.JPG