I have no affiliation with the truck or seller. I have not personally looked at the vehicle. The photos look good on craigslist. I saw this add yesterday and am going from my faded memory. The St. Louis craigslist has a '64 grain truck listed. It looks solid in the photo. This cab will interchange with the PU if the trans tunnel is changed. Just a bolt in opperation. From my experience buying an old farm truck is the best way to get a good cab. It sounds as though the current owner just wanted the motor which he removed.
