TO ALEXRAPTOR: Yes, I am sure. Looks to be a snap-in type truck.

TO YAMPA BOB:  Many thanks. These look to be the snap-in type trucks and me not being very mechanically inclined, I was hesitant to apply much pressure to remove. However, I believe you have provided the necessary into. to allow me to make a decision.

I have several Bachmann freight cars manufact. in 1970's, which have old-style hook-horn couplers which attach to the trucks. There does not appear to be any screws which attach the trucks to the body of the car.
Is there an adapter or any means of easily converting these cars to today's magnetic couplers? If so, how?