Edited: another fuel/temp gauge thread, but turns out the harness is melted together

Do temperature senders vary from year to year? I am running a 1978 360 in my 1973 Swinger.

Also, I just left the sender installed that came with the engine before I rebuilt it. I actually have no idea of it’s origin.

I think I still have the sender that was installed in the original 318. Maybe I should swap that in?