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Old Aug 1, 2012 | 06:56 PM
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Highboy frames

Ok I want to swap a 12 valve into a highboy, my basic goal is to have a sled pulling truck that is geared for highway use. So I'm wondering if the F250 and F350 highboy frames are the same? I don't care about the suspension as I'm going to change it anyways. I got a lead on a 72 F250 that is in good shape supposedly that the owner wants to get rid of. Would that be any good for my plans?

Thanks
 
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Old Aug 1, 2012 | 07:05 PM
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From: townsend DE
Originally Posted by b money
Ok I want to swap a 12 valve into a highboy, my basic goal is to have a sled pulling truck that is geared for highway use. So I'm wondering if the F250 and F350 highboy frames are the same? I don't care about the suspension as I'm going to change it anyways. I got a lead on a 72 F250 that is in good shape supposedly that the owner wants to get rid of. Would that be any good for my plans?

Thanks
a 72 is actually a bump side but the frames will be the same as a 73-77 highboy.

as to your question about a HB being the same frame as a f350, your answer is no. the HB as a unique frame.

im building a 76 HB with a 12v right now, check out my build thread
 
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Old Aug 1, 2012 | 07:18 PM
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In the 4x4 the f350 didn't start till '79 and it was considered a low boy. I'm not so sure that a dent side body will bolt right on to bump side frame if thats what your planning ? Frame widths are different in the high boy from the cab back. I'm sure someone will come along with that imfo though.
 
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Old Aug 1, 2012 | 07:49 PM
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Oh ok I so I guess I'll have to go with an f250 highboy, I thought you could get 4x4 on both 3/4 and 1 tons. As far as swapping bodys I don't plan on it I just mentioned the 72 because I found a deal on one but I like the body style of 73-77 whatever year I get I'll most likely stay with that body.
 
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Old Aug 2, 2012 | 07:18 AM
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Originally Posted by impalaslayer
a 72 is actually a bump side but the frames will be the same as a 73-77 highboy.
The wheelbase on a 1972 would be 131" for a standard cab truck. In 1973 the wheelbase was increased slightly to 133".

I don't know definitively that the frames are different, but I'd recommend taking some measurements to ensure the 1972 frame will work. My suspicion is the frames are slightly different.
 
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Old Aug 2, 2012 | 11:41 AM
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From: Townsend, MT
Originally Posted by impalaslayer
check out my build thread
You should put a link in your signature so it is easier to find
 
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Old Aug 2, 2012 | 12:49 PM
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Last I checked they don't let you do that here. I tried with the build thread on my crew cab a while back &it was a no-go...
 
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Old Aug 2, 2012 | 03:26 PM
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From: townsend DE
Originally Posted by ChaseTruck754
Last I checked they don't let you do that here. I tried with the build thread on my crew cab a while back &it was a no-go...
lame.

didnt realize there was a 2 inch difference in wheel base, ive never owned a bumpside, they are quite rare around here and have only ever seen one for sale.
 
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Old Aug 2, 2012 | 06:13 PM
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So what year(s) would have been the strongest of the highboy frames?
 
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Old Aug 2, 2012 | 07:19 PM
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From: Townsend, MT
Originally Posted by Blackfoot Big Block
I don't know definitively that the frames are different, but I'd recommend taking some measurements to ensure the 1972 frame will work. My suspicion is the frames are slightly different.
My suspicion is that the springs are not centered on the '67 - '72 highboys (the hole in the rear springs is ~ 2.5" ahead of center IIRC).

It might be the front springs too though. I can't remember. I thought that the frames were identical.
 
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Old Aug 2, 2012 | 08:02 PM
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From: townsend DE
Originally Posted by b money
So what year(s) would have been the strongest of the highboy frames?
pick one..
 
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