I need help with the reverse lights.

Let us know how you make out. Converting to a later style reverse switch is difficult for most (requires going inside the transmission to change the 'comb').

Trying to remember exactly where I got the part number. My car is a '67, but I can't recall if I got my hands on '67 Parts book for that one or might have used a later book. However I just checked 1968 book and that's the number listed for all models using an automatic with column shift.
p/n 2883 211 and its listed in the steering section 19-46-44 as Pin, steering column gear tube switch, w/ auto transmission column shift.