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1973 - 1979 F-100 & Larger F-Series Trucks
difference in frames

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difference in frames

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Old

Apr 7, 2013 | 04:25 PM

#1

jtjohn302

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difference in frames

so i went to put my dually bed and stuff from my 77 ext cab to my 78 crew cab but the frame appears to be 3 inches narrower on the crew cab... any explanations? thanks

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Old

Apr 7, 2013 | 04:27 PM

#2

RoughIdle

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From: NW Iowa

I just got schooled on this earlier, your frame is similar to one from a high boy, they are narrower than the rest.

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Old

Apr 8, 2013 | 04:43 PM

#3

jtjohn302

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this throws a small wrench into my plan... guess ill have to make some brackets now thanks!

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Old

Apr 8, 2013 | 07:22 PM

#4

privateer, eh

Hotshot

Joined: Sep 2012

Posts: 17,708

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From: Calgary

Dually frames measure about 34" wide outside to outside to allow room to mount springs due to dually offset, about 5". I was told a long time ago that the 350 dually frame was narrower than the 250 frame but never saw for myself.

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