I looked at the other potential donor truck today. It is a 1948 with vin number 5RWL10030. It is a flatbed. I can't tell for sure, but it looks like a 1.5 ton?? I think I know the answer to this but want you experts to tell me that the cab from the 48 will fit the 51? Thanks. I tried to post pictures, but I don't think it worked. I will try again soon.