This isn't the first time I've been asked about railcars recently.
To start with John's question. Possibly BUT the body isn't the difficult part of such a conversion. Finding a suitable chassis with all the waggly valve gear bits is pretty much impossible. Maybe there is something from a continental range that could form a basis but it's going to be a lot of work.
Far better, if I'm honest, to await the RTR version from Kernow Model Centre. For £150 and a bit of a wait, I don't think you'll beat it.
However, this isn't a blog where I sit and wait for someone in China to be told by the bloke who used to run Banbury model railway exhibition what to do. No, I still have a Nu Cast whitemetal kit to build.
When I left the model, I'd put the powered end chassis together and was about to fit the mechanical bits. Easy, or so you might think.
Well, persuading the motor to fit in the casting that appeared to be the mount took me over an hour. Lots of filing and scraping at the whitemetal to make the distance between the sides wide enough to slip the DS10 in place.
Eventually, there was success. With a couple of plasticard wedges, the motor turned under power and didn't rattle the sides.
Then I had a look at the gears. And there was a problem. Oh, yes, a good 'un.
The worm gears is too fat for the chassis and even if I fix that, it's nowhere near the gear on the axle.
Re-reading the instructions, I spot a tiny note on the drawing showing the motor doesn't fit where I thought. It should be on the back of the casting. Arghhhh!
However, this isn't the solution you might hope for there are some issues.
First, it appears to be held in place with willpower and possibly fairy dust. Certainly no screw attachment points or castings are shown to do the job and nor are they evident on the model.
Second, the gears are still in different time zones and the worm isn't going to fit any better between the frames.
I'm sure there is a fix for this, probably a different motor/gearbox combo (no I won't use a SPUD at the other end, I want the waggly bits powered) but I need to know how much space is available. Therefore the next job is to build the body and see how all this lot hangs in there.