When I added a sway bar to my '49, it was like night and day how much better the truck drove. It still rides like an old truck but no more fighting to keep it in the lane on rough roads.
'38 Chevy 1-1/2 ton '49 Chevy 1/2 ton '54 Chevy 6400 2 ton '55.2 GMC 3/4 ton '56 GMC 1-ton