1967 C10 1/2 ton small back window question

[chewychevy67]

look at the ignition bezel. most likely the dash has not been swapped and 67 has a smaller ignition bezel than 68-72. there are many clues if you search on how you can tell if a big window cab is a 67 or 68-72. firewall by the heater unit is different stamped a little different. rear view mirror I believe is a one off in 67 and the mounting hole design for it is reversed in 68-72 if it had one at all.