What I have learned so far, and questions that remain for me:
1. This truck was indeed a 1958 M56B1 with winch and spotlight.
2. No indication of door plates to verify which unit may have procured it. Definitely US issue, but hard to say from there.
3. Most likely a utility truck of some variation.
What I am interested in knowing:
1. Did all M56B1 vehicles left the factory as cab and chassis and end users had built up to suit?
2. I have read there were something like 560 M56B1 with winch produced. Out of that would include fire/crash rescue, different utility truck configurations, etc. ?
3. What is the impact to my vehicle’s value having a non-standard configuration (bed from M37)? I am considering modifying the platform in front of the bed and adding side facing jump seats (like the ones in an M37A1 bed by the spare tire). Other options are to leave it, switch bed with an M101a1 with minor tweaks to fit. Will this hurt the value, or should I consider passing on to a collector due to rarity of the M56 models? I am sure someone is willing to build a period correct utility bed, but that is not me...