I posted about this on another Forum, and thought I would do the same here, in case anyone might be interested. I had a similar version of this years ago; it had (2) screws holding the body halves together, and an open-frame motor. This one has (1) screw (up front) and a tab holding the back in place. It has a Mabuchi 15R grey can motor, so I dunno if this one is an older example...(?)
I started with this:
...and here is the (more or less) final result:
Still need to find an oil tank; certainly no award-winning model, but I had fun working on it.
Mark in Oregon