Look to be c600's. When I was looking for my truck I ran across this guy in Sacramento, CA area. Has 3 COE's with papers. One had blown engine but was restored, the others were parts trucks. He wanted 1k for all 3.

 

 

Black one with a 391--if it's still a 391--would be worth looking at.

 

it has a blown motor...guy said he got it all redone...then motor took a crap. He was going to throw the Diesel from one of the other trucks in there. He wants 1k for all 3 trucks.

Original ad on FB. I asked about the trucks in the background and he told me about these.