I will look at site. And to answer your question no I believe it is a 3800 2 ton oor 1 1/2 ton I just went and took the yoke off it is a 11 spline..

My 55 first series was a 3600 3/4 ton with a 4 speed great truck drove it for almost 10 years.

So what you are saying is they make a u-Joint that has make. 1 1/16 x3 3/16 x1 3/16 x3 11/16 on the other that would be awessom.

Thanks Kevin

Mike

1955 second series 3200