Mike, that is the trouble with the internet, even Wiki is not always accurate.
The pass runs more SW to NE with 48 hairpins on the "east ramp" and 39 hairpins on the "west ramp" as Denzel puts it. Denzel publishes the "
Grosser Alpen Strassen Führer" if you are ever looking for
the book on alpine roads. If you do any driving in the Alps, it is a book worth having.
Just mentioning the details for those who have not been there.
No need to sell me on the Stelvio; been over it many times on my motorcycle. Great road...they all are!
You might want to post a map of routes taken highlighted or links to ones created on Google Maps.
I wish you would have driven the SS46 from Rovereto towards Schio. If you drove up the A22, you drove right by.