Re: 1/2 ton SWB GMC vs Chevy frames
I used a 58chevy frame under a 57 GMC. I moved the rad support frame brackets to match and cut the frame off ahead of the rad support to match a 55-57 frame length there for the bumper mounts. the assembly manual will have those dimensions, you just have to look hard ay how they figure things out referencing other dimension reference places.
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