I have what appears to be a 53 Five window, (was it available?) based on the doors. I know I have a 55 235ci, trans unknown still, radiator is indicating 53, I think.

Anyway-

Looking at Grumpy's catalog for door latches, they show left and right (mounted in door) for 47-51 using four mounting screws, 52-55 1st using three. The strikers mounted on cab use four for 47-55 1st.

I was told it was a 51 with the original 216, so what do I know? I guess every part you have has to be looked over?

Though I'd share. I've been all over your search feature for two months, and I can't believe how much info is out there. Thanks.