I am in the middle of gathering parts for building a 1967 289 4v mustang. I happened to get a 1999 t5 equipped mustang. That I am taking the transmission out of to put into the 67. The question I have. Has anyone figured out exactly what type of signal the oss puts out? I have read many discussions on this forum and the answers vary from Hall effect or sine wave, to variable voltage. Can anyone confirm signal type?