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Need some input from the Guru's.
Brace yourselves, this is going to be a little long but i am looking for some input and advice. Alright i have recently bought a 40' fifth wheel dry weight of 13 500 gross of 18K. My truck is an F250 CCSB, mods in my sig. It towed it very well, even got cut off at 55mph and stopped with plenty of space safely. I am not concerned with the trucks ability to move or even stop the trailer. I have the proper commercial licenses to drive a vehicle that heavy in California as well, however my truck is over its legal limit. Now i could swap in a dually rear axle which would be relatively straight forward and for appearances sake i would be a 1 ton, i even have a matching dana 60 up front, but if for some reason they throw me on a scale i will be well over my maximum, empty i am about 1500lbs over and typically i would probably be 3500 over. I pack light but the trailer is now my home and i have a harley and a tool box in the rear.
So enter my newish plan, and what i am looking for opinions on. The similar year f450 has a gross of 26K, 6K over my 250 giving me the need weight limits. The 450 would also boast a larger frame, axles and brakes. However i have put considerable time and money into the modifications of my truck and it is a crew cab as well which i would like to retain. The engine transmission and transfer case on the 250 is the same as the 3/4/550 so i could swap it over and be solid. My engine has more power, good EGT's a higher rated clutch and a newer trans. My biggest question is the cab swap. I have heard that the frame rails are narrower on the 450s. With that being said would the cab swap still be as simple as just lining up the body mounts and bolting it on? I know that i would need to have additional body mounts added for the crew cab, how difficult would that be? I am looking at 450s with a similar wheelbase so that i will have enough clearance.
Any input is appreciated. I know this may be a little over the top so please only comment if you have something constructive. Also please dont just tell me to buy a medium or heavy duty truck either, i dont want to take that route just yet. Thanks again
2000 F250 CCSB 7.3 PSD 6 Speed CFM Intake Manifold AFM Stage 2 Intake Snow Performance Water/Methanol Injection 160/100 Injectors GTP38R Adrenaline HPOP 203* Thermostat Air Dog II Gear Vendors Over/Underddrive 450HP Clutch 4.88 Gears ARB Lockers Mishimoto Intercooler Turbomaster Wastegate Controller 4" Turbo Back Exhaust DP Tuner Icon 4" Lift 37" Procomp Mud Terrains Fabtech Tration Bars