neutral saftey switch

got a 69 dart 3 prong nss harness and a 727 with 1 wire nss from 70 Newport. I have read conflicting post on Google where some say you can put a 3 wire nss in trans and its fine but others say it won't work. Can I do that or what other options are there? I could wire the middle wire to it and it should work? Just wouldn't have reverse lights?