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1999-2007 Upgrades and Aftermarket - General Upgrading or adding OEM or aftermarket equipment to your 1999-2007 Super Duty. Please confine discussion of topics in this forum to those items that are not engine-specific.

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Old 10-22-2006, 01:43 PM   #1 (permalink)
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Frame Extension?

I would like to put a 12' utility bed on my 350, that means I need 84" Cab to Axle (CA) legnth.

My options as I see them:
1) Scrap this truck and buy a 2001+ F550 4x4 CC with 84" CA (HARD to find since they only made them from 01-02!)
2) Extend the frame on my current F350, and keep all of my mods, etc. Possibly swap in <with some welding for new spring perches> an F550 D135 axle (and regear the D60 in front.)


Issues: Pickup frames are a little wider, utility box will have to be sized to fit, and an axle swap will require cutting and welding new spring perches, not too bad.

My biggest question: can I have a quality frame shop extend the pickup frame nearly 2 feet without compromising the integrity of the entire vehicle?

I would add an uprated weight sticker to the 350 to about 15000lbs (and get 450/550 front adapters, and use 19.5" OEM wheels/tires) when it's all said and done.

What do you think?
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Old 10-22-2006, 06:48 PM   #2 (permalink)
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Re: Frame Extension?

What about this?


http://www.railerbed.com/home.html


Cheers
Mark
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Old 10-22-2006, 10:44 PM   #3 (permalink)
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Re: Frame Extension?

Well, I dont know exactly how much money you have, but so there would ONLY be one weld, I think I would find a frame from another truck,, make the cut on yours where you want the splice to be,,and cut the other one two foot forward of that,,when you put the rear section on,,it will be two foot longer, then ONE WELD and some bracing would be much easier to do,,, just a thought.
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Old 10-23-2006, 12:18 PM   #4 (permalink)
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Re: Frame Extension?

[ QUOTE ]
...My biggest question: can I have a quality frame shop extend the pickup frame nearly 2 feet without compromising the integrity of the entire vehicle?

I would add an uprated weight sticker to the 350 to about 15000lbs (and get 450/550 front adapters, and use 19.5" OEM wheels/tires) when it's all said and done....

[/ QUOTE ]A quality frame shop should be able to extend the frame in a safe manner that keeps the strength of the original frame. But is the original frame as strong as it needs to be for what you want? One thing that comes to mind is what is the strength differance between the F450 frame you want to replicate and the F350 frame you wil be using? What I mean is, are the F450 frame rails made of thicker steel, are they taller/wider rails, etc? Even a seemingly insignifigant increase in the size of a frame rail can make a large differance in its strength.

I don't know how things are where you live and I hear some states will register the vehicle as what ever weight you tell them it is but I believe only a certified upfitter can legally change the actual GVWR of a vehicle.

Not saying it can't be done, just pointing out something to consider when making your decision.
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Old 11-29-2006, 08:55 PM   #5 (permalink)
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Re: Frame Extension?

What about adding extra steel in either L channel or C channel?
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- 99 F350 CC, LB, Dually - 01/98 Production Date - Tommy Gate hydraulic liftgate (awesome & highly recommended.)
- 19.5" Goodyear G622s on F550 wheels front and rear.
- F550 brakes. 1050CFM thermostatic 2nd tranny cooler. Prodigy brake controller.
- 4" exhaust to the turbo. 4-pillar EGT, TRANS, WATER, BOOST.
- Ford Ambulance APCM/AIC. Severe Duty AIS.
- Code 3 2100 LED Lightbar, Perimiter Strobes, LED-X lights, Electric (firetruck type) warning horn & PA.
- 4 batteries, Xantrex 250A automatic battery combiner/splitter.
- Dual Xantrex Prosine 2.0KW inverters for 110/220v, Laser printer/copier, plasma cutter, welder.
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Old 11-30-2006, 06:07 AM   #6 (permalink)
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Re: Frame Extension?

[ QUOTE ]


I would add an uprated weight sticker to the 350 to about 15000lbs (and get 450/550 front adapters, and use 19.5" OEM wheels/tires) when it's all said and done.

What do you think?

[/ QUOTE ]

You don't assign the weight sticker, a goverment agency will need to evaluate what you have done and they will assign a new weight rating. I doubt you will ever come close to having the same weight rating as a F550, there are lot's of differences. I would probably look for what you want and buy it already made from the factory. But I don't like headaches.
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Old 12-05-2006, 07:36 PM   #7 (permalink)
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Re: Frame Extension?

Check for a utility bed installation shop in your area. They do it all the time and know the correct way to go about it.
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