Overall, the gears don't look too bad, but there are some areas of the gears that need inspection that don't show. Also, did you have a 3rd gear in the box? The needle bearing race surfaces need inspection as well as the slide gear inner teeth. Reverse looks more beat up than the first gear slider.
There are a lot of items in the gear box that need to be checked. Also, all part numbers need to be checked for compatiablility with each other. 22G200's can pretty much interchange with 22G1100's, but not with any 22A's or some of the early 22G's (Morris Minor/early Sprite boxes). Some mini gears will interchange and some not. There was some pretty good information available that listed all these part numbers.
At the end of the day, the best thing to do is to send me all the internal parts, pieces and components and see what is reusable.
Still cold, wet in the AM, but sunny in the PM here at Road America. Start the trek home tomorrow after a stop in Peoria to pick up some parts.
Take care,
Mike Miller