Frame width
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Senior User
Joined: Sep 2003
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From: Bridgeville,CA
Frame width
Does anybody know why Ford made the frames narrower on the 1973-78 Crew Cabs and High Boys? I just bought a hitch for my 1973 F250 High Boy and it was too wide. I called Curt Manufacturing and they said that I needed the narrow model. Amazon admitted that the Crew Cab needed a different hitch but said nothing about the High Boy. It seems that it would be to the manufacturers advantage to stay with one width.
Moderator
Joined: Jul 2011
Posts: 6,513
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From: Sioux Falls Area
cant help you with the "why's"
but for the record the trucks with the 140" wheel base have the same narrow frame width. (34-1/4"?)
i got burned too, as none of the manufacturers list the 4x2 f350's as being different than any others.
but for the record the trucks with the 140" wheel base have the same narrow frame width. (34-1/4"?)
i got burned too, as none of the manufacturers list the 4x2 f350's as being different than any others.
Post Fiend
Joined: Apr 2008
Posts: 8,261
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From: Big Sky Country
From '61 to '77 highboys (and crewcabs) both shared the straight, ladder style 34" frame.
In '77 Ford widened the frame to 38" (from the cab rearward) making for a weaker frame, they also married the T-case, lowered the suspension, and imo made it less of a "truck".
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
33 1/2" width between the inner frame rails behind the cab: 1961/72 F100/350 / 1973/77 F250 4WD (High Boys) / 1973/79 F350 Cab & Chassis / 1973/79 F350's on the 140" wheelbase.
All other 1973/79 F100/350's have 37 1/2" width inner frame rails behind the cab.
All other 1973/79 F100/350's have 37 1/2" width inner frame rails behind the cab.
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