Highboy specific brackets??
################################################## #########################
# Highboy Frames #
################################################## #########################
Highboys have a unique frame, not shared with other trucks. Like the F-350
frame, all Highboys have a narrow frame, which is 33.5-inches wide. Sixth
generation (1973-1979) F-series trucks had wider 37.5-inch rear frame
rails, except for the 1973-1977.5 Highboy frame and the 1973-1979 F-350
with 139-inch wheelbase. This frame rail width is measured directly
behind the rear bumper, from outside of rail to outside of rail. The F-350
frame was narrowed for duallies. The Highboy frame does not bend to the
left or right (unlike the other F-100, F-150, or F-250 frames), though it
does bend up and down to accommodate the cab. A front crossmember,
positioned just below the front bumper and visible while standing in front
of the truck, separates the Highboy frame from the bumpside F-350 frame.
No other truck had this crossmember. Since Highboys have a frame that is
different from other F-series trucks, Highboys require different beds than
other F-series. The Highboy frame was never used on another truck. ##############################################
So on the highboys the frames are 34in throughout , where as the non-highboy trucks widened to 37.5in in the rear.
################################################## #########################
# Highboy Frames #
################################################## #########################
Highboys have a unique frame, not shared with other trucks. Like the F-350
frame, all Highboys have a narrow frame, which is 33.5-inches wide. Sixth
generation (1973-1979) F-series trucks had wider 37.5-inch rear frame
rails, except for the 1973-1977.5 Highboy frame and the 1973-1979 F-350
with 139-inch wheelbase. This frame rail width is measured directly
behind the rear bumper, from outside of rail to outside of rail. The F-350
frame was narrowed for duallies. The Highboy frame does not bend to the
left or right (unlike the other F-100, F-150, or F-250 frames), though it
does bend up and down to accommodate the cab. A front crossmember,
positioned just below the front bumper and visible while standing in front
of the truck, separates the Highboy frame from the bumpside F-350 frame.
No other truck had this crossmember. Since Highboys have a frame that is
different from other F-series trucks, Highboys require different beds than
other F-series. The Highboy frame was never used on another truck. ##############################################
So on the highboys the frames are 34in throughout , where as the non-highboy trucks widened to 37.5in in the rear.
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