Before I would try to remove the inner panel to push the dents back out (are they severe?), I would drill holes in the inner panel to facilitate pushing the dents back out. It will be much easier to weld up a few holes than cutting and re-welding the spot welds.
Carl

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission