Don't see why not. You got to make the driveshaft a little longer, run a longer brake line to the rear, and run longer wires to the rear lights. Everything else is pretty much the same as building a short bed truck.
I've done several long beds, starting with a '66 C10 back in the late 70's. For a number of years my daily was a '72 C10 long box. My favorite has been a very non-HAMB friendly '89 Chevy 1-ton 4x4 that I used to pull my trailer. It was both very useful and looked great. Sadly it lost out in an accident a few years back. My current project is a '54 GMC 1-ton which didn't come to me with a bed. The factory bed would be nine feet long. I'm keeping the full 137 inch wheel base and haven't solved the bed problem yet. I will NOT be shortening the truck because I'm building the truck to pull my trailer and I want both the length and weight in the truck. Here it is as it arrived home a while back. Today the cab is off the frame, it has a GM 14-bolt rear using the stock rear suspension, and the disk brake IFS from a '72 C20. A Cadillac 500/TH400 combo is nearby. You can't really see all the problems with this cab, but I have another I may replace it with and a 3-window Chevy that I might cut up to repair this one. I'm building this truck to tow my trailer and want it well equipped for that task. I'd use the factory 9-foot bed if I could find a good one, but suspect I'd need to modify it because I plan to use a slid-in utility box to carry tools and equipment. I do have some ideas how to make a 10 year old utility box look right on a more traditional truck. Another approach I've considered are modifying the utility box to look like tool boxes setting on a flat bed and simply hanging the steel edges from an old flatbed on the bottom edges. My favorite approach, but clearly the hardest and most challenging, is to make a pickup bed based on the side panels from a similar year 1-ton panel. It would have a classic look but also be smooth sided. I have a parts panel I can use but am unsure if I'm willing to commit to the sheet metal work. So yes, I've run several and my next finished project will be yet another one.
I think rake makes it or breaks it with long bed styleside/slab side trucks. Personally I prefer a little forward rake. I'm installing a 2.5" drop axle on my truck next week for that reason.
My 50 is a longbed F2 now with half ton stuff. Have a couple of pics in my profile, but I don't know how to post them using my iphone.
Mine (in my avatar) started life as a 3800 one ton with a 9 foot bed. I cut 30" out of it and made myself a short bed. 9 feet is just way too long.
Heres Norm Grabowskis long bed hot rod... I love the front bumper it's carved with "Boogie till you Puke"
at the shop we are building a 53 International long bed for a customer, I'll get some pictures, We put a LS1 and 4L60 transmission it should haul ass.
You too, huh? The DT above has a 6.0 (LQ9) and 4L60E with 4.10's in a Dana 70. I'm expecting adequate (as Rolls Royce used to advertise) performance.
Here's my Hot Rod long bed. It works for a living too. If you don't think it's a Hot Rod watch this. http://www.youtube.com/watch?v=28gtzOJdHqg
I've had both and think they they each serve a need. Have a short bed now, but no interest in getting a goat thank you. Here another one I've owned.
I'm almost done with my 59 Chevy 1/2 ton Longbed fleetside, will post some pictures when done....Sure is alot of Late 50's long bed fords running around here. Wish somebody would post some 58-59 chevy fleetsides.
If I had one like that without a bed, it would get a flat bed. It would have to be a dually though to look right. I actually have a motor home chassis in the barn looking for a body. The one I have that this post id for is a '54 3/4 ton. It is so solid I do not want to do any cutting on it.
I've still got that original '54 flat bed. I'd swap you for your bed sides. I also still have that '54 cab and big nose...and a '49 complete cab and short bed and S10 long bed frame and fenders. I'd swap the whole '49 for that 3/4 ton.
My objectives for this specific truck make a simple flatbed the wrong answer on it. I own several flatbed trucks and having one more would not do anything I need to do. I also have a '54 GMC 1-ton dually Hydra-Matic truck. One of my visions of it finished is with a simple flatbed. In that approach it looks and basically is stock and isn't worked but rather is shown.
I would honestly rather just sell it. I want to get going on one of the Ts and I have a hankering for a mid to late '30's sedan. I just figure if I can't sell it I might start messing with it.