just an update:

Borgeson u-joints are good to 35 degrees, and we already know they work here.

The pinch-bolt type u-joints do require notching the shaft for the shoulder bolt to clear (a good thing), so probably a good fit for our lower u-joint.

So, my current shopping list:
upper u-joint: Borgeson 1"-48x1"DD (stainless: #114352)
DD slip shaft (Borgeson 450024 or others)
lower u-joint: Flaming River 13/16"-36 x 3/4DD pinch-bolt u-joint (stainless: FR2719DD)

I think there are a lot of possible solutions. Thanks to Jim Fawcett for heading down this path and figuring out the sizes.

Karen
1975 26'