I think I may have found the issue...
The outer most drive-side bearing is kind of gnarly on the inside diameter.
I flipped the case around and that bearing will not go on the appropriate shaft.
Tomorrow I will drive out the roller bearing race, and ball bearing and get a closer look.
The retainer clip was missing as well, but the bearing seemed to be seated correctly with the thin shim behind it.
I ll keep everyone posted.
Thanks.
Those bearing circlips are a nightmare so I bought the type with the little loops on each end. My bearing supplier managed to find some with the correct thickness which I think were from USA.
AFAIK the only difference between early & late cases was the strengthening plate for the cams
And the placement
Early cases had the cams closer together and the cases end to crack around them'
Am yet to see a clean one
They cured this by widening the space between the cams wih a bigger pinion and of course he carrier plate.
Not sure when they did it
The M23 is the early narrow case .