hi therenot certain what 1/2 generation trucks are (excuse me i'm English) but a Mid Fifty F100 catalogue gives some basic dimensions for 6-1/2 ft. pickup
re problems... front cab corners just below the strenghtening bracket there are about 3 layers of body metal spot welded together ... if it looks swolen/ bulged its probably corroded between the layers and its abig job to repair i don't like body work!!
stuey