If the main hoop will fit within the confines of the body, the rest can be made to work with relative ease. Also, if it is mild steel, it's not worth much. Few hundred bucks, tops.........assuming it fits.

I would also say that whoever built the chassis, is not the one who cobbled up that truck iron fuel cell mount in the rear..........unless the rest of it also looks that rough upon closer inspection.

To see if it will fit........measure the hoop at widest point and measure inside of car. Also measure height of hoop from rocker bar and then determine, with rocker bar properly positioned in rocker area, that hoop is not too high or too low in body