well, I got the tranny out of my 58. It is a 10 spline output, but the gears inside are worn (1st gear) so that is why it was slipping out of 1st. Also, the front of the bearing retainer was broken off, that is why I was having clutch problems!

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