try looking under the trucks, sometimes there are screws
hidden under them. also try looking on weavers web site for schematics
of your loco. to find out where screws are located. after all that, even
when all the screws are takin out sometimes the body is a snap fit
to the chassie. you may have to pry it loose.
what are you going to do with the motors?? and what do they look like??
I might entertain makin an offer to power a dummy loco I have!!