A ‘56 Crown Vic would’ve made a fine-looking Ranchero too, but they didn’t come out with one until ‘57. Just crop the roof to follow the chrome bar running up and over the roof, then extend the “bed” after removing the trunk and putting a bed liner of some sort in there. Surprised nobody has done that, it would look very natural. A neighbor in my teen years collected Crown Vics, he had several with the green plexiglass roof section, even a ‘54 on the older body style. The black ‘56 with two tone black and white interior was the prettiest, but he could only drive it in winter, too hot any other time, especially with the plexiglass roof. No A/C.