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Yes, they are much stronger. Also the rear of the Bronco frame curves upward right behind the cab. When you're in a Bronco, look behind the front seats and that 6" rise to the rear seats is also reflected in the frame. The HD/SD frame is flat from the cab back.
There is an '83 parts Bronco a few miles away so, based on your comments, I decided I had better go look at it again. I see the fairly abrupt rise in the frame. I also see the brackets on the side of the frame for the six body-mounts. Based on a sliding caliper, the sheet metal in the frame measures about a sixteenth of an inch thicker on the F-350 than on the Bronco.
However, I do note that the F-350 frame does have a rise in it starting under the cab, but it is more gradual than the Bronco's.
What would be really cool at this point would be to have a Bronco frame right beside the F-350 frame.
Is anybody aware of a good thread on using a Bronco body on a truck chassis?
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
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