Bobby,
I"ll echo Rich's comments on the break wheels. Pushing the stub out is the only way to go. I noticed that the New Haven car you show in the photo is listed as an operating car that originally had Pikemaster trucks with the integral coupler. Yours has the scintered iron trucks with operating couplers. In an case, the car's shell came with the plastic wheel, and replacements are available. That car also has the snap-in frame which makes its removal much easier than the riveted on frame. I don't know when Gilbert went to plastic wheels over the metal ones, but I've never seen a metal wheel break off. I've lost a few, but the metal pins are tough. I believe that Gilbert used the same pin for the older door track guides, diesel ladders, switch flags and maybe a couple more applications.
