I think every one of us needs to own a '56 sometime in our life! I had one that was my DD in about the same condition as this one; it had a Mileage Maker 6 and a 4:10 rear. I can tell you it was not a mileage maker!
I was traveling up I-5 in CA to visit my Sis in the Central Valley and the truck suddenly just died. I sat by the side of the freeway for a few mins, then lifted the hood and somehow figured out it was the carb. I took the top off the carb and saw the float had fallen to the bottom of the bowl! I put the float back in place, buttoned up the carb and all was well!
The 3/4 ton with the longer bed can be made to look pretty good too. I think Dennis Carpenter reproduces the entire F1 bed.