Have 2JHR sat in my unit and due to fit it hopefully soon in my own boat.
If it has a Hurth box on it it wants a Right hand prop- mines going onto a 1 1/2 " shaft and have not long ago bought a 20 x 16 prop.Engine manual, prop calc and Norris's came up with similar size. Crowthers did suggest a 23 inch by ?? initially as being the ideal but I only have room for 20 inch.
Engine bed wise the bearers need to be internally approx 12 1/2 inches apart and approx 1 inch above the centre of propshaft - the whole engine including the gearbox is 1 metre long.
Dont think there is a drawing in the manual but have loads of dimensions, photos etc if you need any more info. Manuals / parts lists online - will have the links to them somewhere but on moby at moment .