Engine most likely CW rotation when viewed from flywheel end. A quick look at bell housing will also confirm this detail.
They used to have Prestolite starters in them, sometimes Lucas, often Delco in the USA. The different starters use differing spacer/adapters. Delco is the most readily available and serviceable for your application in the West. We stock spacers and starters... the actual starter designations can be from a very long list but typically model 10MT and I would have to look up the other specs such as Bendix and rotation detail.
dieselgman