In terms of the reverse lights, my '68 cuda was a column shift and the reverse lights were activated from a swith with 2 wires on the lower part of the column.
If yours is like this you'll need to do something else to get them to work. I'm not an expert but if you use a 3 three prong neutral safety switch. You'll need a power source to one of the outside prongs. From the other outside prong, wire that one to the wire that goes back to the reverse lights. That wire should be found behind the driver kick panel. The center prong is your neutral safety switch.
I got lucky as the new under dash harness I got off ebay was set up for a floor shift. Meaning, the bulkhead was already wired for a floor shift so I only need run my outside wire prongs to the bulk head. With that I'm good in terms of being fuse protected and all. I'm not sure what the best way for you wire yours though. Only that you need power to one outside prong and the other outside prong needs to get to your reverse lights.