I've been searching the internet and past threads and can't figure these out. I think they're NP205s. The first one is in my 77 F150. The second one is from a 1978 F150.

If this helps, they have different output shafts. The one in my truck has double U-joints.

 

Look like 205's to me. They came with many different output yoke configurations thru the years and models.

 

I've come to the same conclusion after many many searches.

 

both are 205s. The yoke is the same on both of those cases as long as it is the same series u joint. The single and the CV will both work.