The clam isn't really adjustable side-to-side along the trailing edges, except for some minor movement where it meets the lower A-panel behind the front wheels. I suppose it's possible if the clam is slightly angled to one side that it could create a larger disparity along the other side, but fixing that would involve loosening every bolt/nut that's holding the front clam on to adjust the center line.
The door hinges have shims, and depending on how far you need to move it out, you could possibly increase the shim thickness.
I thought about that as well but than would about the door seals, and the lock? Maybe I should just leave it as is until the next clam-off job (fat away hopefully)