To me the 55-59 front sheet metal clip is even easier to remove in one piece than the AD clip. Mark and save the rear top of the fender to cowl shims and the bottom rear of fender to bracket shims if present. Sometimes there are shims on the two radiator core support mounts. Label them all so the hood to fender gap will stay the same. Once all the bolts are removed have a buddy grab the head light "eye brow" and center of the fender wheel opening while you do the same and it will be balanced. Why fight tight quarters when the clip is SO EASY to remove and lets you walk right up to any component on the engine.

Evan