Grigg,
I think your right about the shorter NV4500. I spoke to a place in Tallahassee, FL and they said they can shorten it down a bit and add the fixed yoke I will need. It will still be longer but I think it may work. I forgot that the NV4500 had a PTO, I would have to figure out a lever system, but that may work. I'm building a webshot site and will post some pics of my truck adventure so you can see what these cool trucks look like.