Aftermarket Steering U-joint

[396C-10]

Hello friends.
I just installed an aftermarket tilt steering column in my 67 C-10 and I am having difficulty finding the correct U-Joint. I cut the lower shaft at 16.5 inches from the rag joint to the upper 3/4 inch 36 spline on the end of the column shaft. I now have a cut collapsible lower, 1/2 inch gap, and spline shaft to steering column through fire wall.
Which U-Joint is the correct fit to join this up? Anyone know a part number or correct label to order this joint? Thank you in advance!