there is a youtube on the task force cab to front clip alignment. maybe google that, it is by old man fixing stuff, or check this link.
https://m.roadkillcustoms.com/1955-5...nel-alignment/
basically, get the doors to fit the cab on the top, bottom and rear of the door openings. then install the front clip and shim the rad support and front cab mounts to get things in the same plane and parallel to the frame, then adjust the cab in a rotational way (in relation the frame, pivotting on the driver's side front mounting bolt) so the gap between the hood and the cowl is correct. remember, these were work trucks when built so body gaps were not high on the priority list when going down the assembly line. also, a door from one truck, even if it fit like a glove, may not fit another truck even if it was the next truck on the assembly line. I have a couple of sets of doors and fenders and none fit the same. the one set of fenders is visibly different at the door gap area.