Here are some more pics, thanks for the help identifying this truck. It appears to be a coleman conversion. The data plate shows serial # 84603---, c3-t8-132, 22500, 4000, 4000, 174, 193. A rear axle tag with a big dTa tag on it, 7.87 gearing. I included pics of the original tires and front fender flairs. Those tires I have on it now are 54 inch HEMMIT tires, tubeless radials that are government surplus new, so I will use them. The truck actually rides pretty good for what it is when I was towing it home. I was working at a scrap yard when it came to me. I just coundn't put the clam to it to pick it off the trailer. Despite being pretty broke, the boss did not pay me for the week so I could take it home. I like the diesel idea, but the engine bay is pretty small. I am currently putting a cummins into a 1967 Kaiser M715 and its taking a lot of fabricating to get it in there.
I was looking for a grill shell as this one has some damage, but the pickups I've found don't have the taper near the bottom of the wheel arch. Those wheel openings are stock, not cut.
http://i1301.photobucket.com/albums/ag101/unbreakable715/100_0632_zpsa713d237.jpg
http://i1301.photobucket.com/albums/ag101/unbreakable715/100_0629_zpsbdeefafb.jpg