Ball and trunnion to u-joint conversion?

What are the dimensions of these driveshaft conversions? I have a nearly new one (made by Denny's driveshafts) that was made for a Dart that had a truck transmission in it that is very similar to the one pictured.
3 1/4" universals, I believe the shaft and slip yoke goes from 60" to about 66" max. I would sell it cheap.