That number should be 4805843. Mine (67 05B conv) only has 43 visible due to previous paint jobs before I bought the car and using thinners to remove the paint removed some of the raised numbers. There are reproductions for this but lack the numbering.
This is good to see another plug confirming the number
I find the sealer on the '68 hinge interesting. Looks like in 68 it was brought down the side? My '67's only have sealer on the top hinge and only on the top side. The texture on yours is interesting. I wonder what was used to cause that pattern.
Thank you for sharing this picture as I am sure future searches will find it helpful.