I guess that depends what you mean by "panel wagon". There is no such thing, but there is a panel truck: and a sedan delivery The 57 panel truck has the same frame as the short bed 57 pickup, but it does have two frame extensions riveted to the back of the frame, and a sway bar mount at the front. And the 58 truck frame is a couple inches longer at the front than the 57 frame. So you can cut down a 58 frame to fit a 57, or weld on a bit to a 57 frame to make it fit a 58
Seems i read somewhere that the radiator mounts are different from 55-57 and 58-59's w/the sheet metal change over.
What's the mount look like on the 5-7? I know the 8,9 just has a small bracket riveted on the frame ( I guess to raise it) should be easy to fab though if he has a donor frame. Posted from the TJJ App for iPhone & iPad
The 55-57 has a small mount riveted to the frame also, there are two different versions for 6 or 8 cylinder (the radiator was in a different place). Neither one is the same as the 58-59 bracket.