Swapping Shells

I have a Bachmann GP50. Is there any other shell would fit on the frame. Besides the GP50 shell.

Jeff may have the answer for this one as I think he has done a few…Tim

I have done 3 in N scale. Mine fits the Atlas GP40/40-2 drives.

Thanks for the reply. Do you think the HO atlas would fit as well. I just want to change the shell so I can add alot more detail to the shell.