Essentially, any car with a clutch safety uses the same (4 terminal) relay that automatics use. Older (69/ earlier) cars with no clutch safety had the "4th" terminal soldered to the case.
Maybe I'll just get the auto trans unit and ground it myself. That way if i ever do put a clutch switch in i can hook it up. I would like to put a clutch safety switch in one day anyhow. My wife has never driven a stick car.............
