Did they ever make a different size input shaft for the SM420?

someone asked me about the size on one I am selling, said he needs the bigger one, that was used on semi trucks!

I think he is yanking my chain as I have never heard of anything other than the 1 1/8 10 spline input shaft but, I wanted to ask, as I, of course, don't know everything!


Mike
1955 Chevy 6400 ex-flatbed (no bed now!) sold September 2023
In the Stovebolt Gallery
1958 Chevy 6400 flatbed W/dump
In the Stovebolt Gallery
1959 Chevy Suburban Owned for almost 20 years, Daily Driver -- sold May 2016
In the Stovebolt Gallery

Sufficient unto the day is the evil thereof