Well i finally got some pics but i dont know how to post them on here but i do have a link that has the pictures on it.

Old Ford Crew Cab Community, Pre 1980 Ford Crew Cab owners community and information source.

I slipped it onto the back of my NP435 and it fit but like i said i have searched high and low for any info on this unit and have had no luck. If anybody knows anything about it, don't be shy and speak up.