Harold Hall's articles provided good guidance on how to tackle the job, so they might be your first port of call. As I recall, there have been other similar series in ME over the years.
The book 'Building a vertical steam engine from castings' by Andrew Smith is still available, I think. That deals specifically with the Stuart 10V, and although it was written in 1977, it gives good advice.
I have built a 10V and the only real challenge was in converting the drawings to metric units.
The 10V is an ideal project and leads to a very satisfying model.
Marcus