I also recall reading someone say the rooster was different between 1 terminal and 3 terminal NSS's. I am guessing that is because we want the center terminal to ground in either P or N, but want the two outer terminals to connect only in R (backup lights). That means the switch probably has 3 positions (off, neutral, backup lights). Still, if they were making trannys for both column and floor shift, I don't know why they couldn't have had the same rooster for both. Maybe the rooster only varied in early trannys that had only a 1 terminal NSS available. The NSS switch is cheap, so best to just try a 3-terminal one first.