Thanks...at least now I can order the right kit for it...now the big question is can I manage to fit the coupler without butchering it too much... 

The Engines have Bachmann Hong Kong Stamped on the bottom. They are identical other than the paintjobs, but have seen them listed on ebay as F7's and as F9's. According to Kadees website there is a different kit depending on which model it is

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?