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Here are the 2008 specs
from Ford Media. This says the inside box height is 20.1".
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No mention of the height of the rig.
Based on the Manning conversion of an F-450 chassis cab to a pickup, the height at the tailgate probably means that you can't haul most 5ers without lifting the 5er. A 5er must be level with the world when wet and loaded and hooked up ready to go, so you can't simply adjust the hitch. And you cannot lower the hitch if that means less than about 6" clearance between the top of the bed and the bottom of the trailer overhang. You have to literally raise the trailer until it's level front to rear. So in a lot of cases a tow body or a Fontaine pickup bed will still be necessary for a lot of 5ers. Don't order the F-450 pickup until after you have had a good session with a tape measure. [img]/ubbthreads/images/graemlins/shocked.gif[/img]
One of my concerns was that Ford wouldn't offer the same GCWR on the F-450 pickup as they did with the chassis cabs. But those specs show the even better GCWR with the high-capacity towing pkg. 26,000 pounds without the high-capacity towing pkg, and 33,000 pounds with the high capacity towing pkg. For 2006, the F-450 with the high-capacity towing pkg had 30,000 GCWR, so the 2008 pickup has even more. [img]/ubbthreads/images/graemlins/warmsmile.gif[/img]
That means that for towing heavy 5ers, the F-350 DRW with the TowBoss pkg has the same GCWR as the F-450 pickup without the high-capacity towing pkg. So there's no reason to buy the F-450 instead of the F-350 TowBoss for towing unless you order the high-capacity towing pkg on the F-450.
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6.4L diesel, 3.73:1 axle = 23,500 = F-350 DRW
6.4L diesel, 4.10:1 axle = 23,500 = F-350 DRW
6.4L diesel, 4.30:1 axle = 26,000 = F-350 TowBoss & F-450
6.4L diesel, 4.88:1 axle = 33000 = F-450 w/high-capacity towing pkg
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The F-450 has a lot more GVWR than the F-350 DRW, so if you haul a slide-in camper, then Ford will build you a good camper hauler pickup. [img]/ubbthreads/images/graemlins/cool.gif[/img]
Another interesting spec is that the F-450 pickup can tow a tag trailer with a max gross weight of 16,000 pounds with a weight-distributing hitch. That means that Ford must offer one heck of a strong Class V receiver on the F-450 pickup. Stronger than a Reese TowBeast receiver which has a max capacity of 14,500 pounds. [img]/ubbthreads/images/graemlins/eek.gif[/img]