Transmission Main Shaft ID Needed

[19Fordy]

I am trying to identify two different transmission main shafts shown below.

I think I got the first one correct as being 48-7017 after perusing Mac Van Pelt's book and the Green Bible.

The second main shaft photo has a different configuration. It's 8.27 in long, has 16 helical teeth and 30 synchronizer teeth at it's front end. However, the width of the shiny, tapered surface at the front (for the synchronizer) is much narrower than on #48-7017. It's only 2.280 in. wide.

QUESTIONS: What is the correct part number for the mainshaft in the 2nd
photo and
What year and model Ford transmission does it fit?
Thank you, Jim