Yup I several of both, the powered (or the dummy) chassis works for an A or a B unit body.
THANK YOU!
Below is from the HOSeeker.net website.
I don't know how many versions of this they made. But this one has a DCC plug.
There is also a Bowser/Stewart version.
From the diagram it looks like the frame fits both shells.
I'd like to convert a Stewart FTB from dummy to powered. Just curious if the B shell will fit a std. powered A chassis?
TIA