Hi George,
All my rear-ends are of S2-4 Alpines. They are standing up, so the lower wheel can not rotate. Then I turned the upper wheel 1 revolution and checked the upper wheel, it turned twice, one turned even more, the others turned less then 2 revs. From this my guess it that most are 3.89 or 4.22. Not your 3.70?
Does this make sense. Let me know If this sounds right, I would love to help you and get rid of all these parts. I hate scrapping all this. Robert