This is a common problem on these trucks. I uncovered a bad slide hammer and bondo repair on mine and decided to replace the panel with the full patch. It was a little harder on my '50 as I had to cut and weld in the driver's cowl vent opening and frame. In hind sight, I probably would have tried harder to fix what I had, or at least only cut out the worst damage. It is a [censored] to cut out this entire panal (eg where it is lapped and spot welded in hood hinge area.) And off course it is a [censored] to get it all aligned back up. However the up side to cutting it out is being able to clean and coat inside of panels and makes straightening the door jamb easy. I also found the inner kick panel was slightly rippled from the damage as well and was easier to repair by removing the panel. It is also true what they say about the fit and finish of these trucks. I am by no stretch of the imagination an expert body guy or welder and my work looks better than most all of the factory work. Believe me that is a sad fact.
Steve O

1950 Chevy 3100
261, 4 speed
Purchased 1977

1964 Pontiac Lemans Convert