Having just been given a couple of trains, I would like to fit Kadee couplers to them. Unfortunately being new to North American railways, I am unsure if the trains in question are F7 or F9's. The trains in question are from the early 80's I believe one is a Burlington Northern #9710 and the other is  CP Rail #1412 Has anyone come across these or had experience in fitting Kadee couplers to them?