Driveshaft Differences?

[Alex V.]

I'm still hunting down a vibration in the '67 'Burb's driveshaft - looks like the front shaft is bent through the middle, so I'm looking for a used one or will have a new one made. But first, I need to determine if my DS is a stock piece or if it was custom made/shortened.

The 'Burb (2WD 1/2 ton) was originally a 3-on-the-tree but was converted to an NP435 4-speed before it came into my family. I've seen several late 60's 1/2 ton trucks with the driveshaft that utilizes a movable carrier bearing and the slip yoke in the end of the transmission - however, my DS is made from larger tube than those shafts, has a rigid output on the trans., a rigid carrier bearing, and the slip yoke immediately behind the carrier. I've seen pics of a few shafts of this style, but none were in the truck so I don't know exactly what it came in. Therefore, I'm not sure if my driveline is part (or all) custom, or if it's all heavier-duty factory parts that the PO bought over the counter for the trans. swap. What can ya'll tell me about which DS was for which application? Dimensions for the different shafts would be great, as well.