Alan-
Your truck looks great.
The Dead Lockers are a universal wiper arm. They have an adjustable length, so they can be used on any vehicle. One thing I like about them, is they have a lock to keep them on the splined shaft, instead of just friction like most do. There is a push-button on the front to unlock it.
I just happened to stumble upon them at a junk yard about 3 or 4 years ago. I thought they were neat, so I picked them up and never used them until earlier this year when I installed my electric wiper motor. Unfortunately, the junk yard closed and they brought in the crusher. :mad:
I can get you a pic of one if you need to know what they look like. Most people probably won't know they aren't original, but I do.