350 vs 450

personally I would stick with a 350... a 350 can be purchased as a dually or singled, where the 450 is always a dually.
the 450 offers nothing more than a 350 dually except a 1000lb more weight capacity and somewhat lower mileage.... not a good enough trade off in my opinion, especially when the 350 has everything it needs to pull an RV.... if it was being purchased as a commercial vehicle and pulling maximum loads, it may be different.
one thing to look at is the transmission... different brands and different years, the 450's can sometimes be found with heavier transmissions in them for commercial duty applications, where sometimes these heavier transmissions arent available in the 350's

Second Chance wrote:
1. The F450 has a wider front end (wider track) and smaller turning radius.
2. The rear end gear ratio is lower on the F450.
3. The F450 has larger brakes (given same year models).
4. Depending on year and equipment, the F450 sometimes has a lower payload rating. This is due to the fact that the numbers on the F450 are calculated using the SAE J2807 standards.
5. Depending on the state, the F450 can cost more to register and insure than the F350.

Rob

Lower payload is based on the GVWR of 14k.

1. The F450 has a wider front end (wider track) and smaller turning radius.
2. The rear end gear ratio is lower on the F450.
3. The F450 has larger brakes (given same year models).
4. Depending on year and equipment, the F450 sometimes has a lower payload rating. This is due to the fact that the numbers on the F450 are calculated using the SAE J2807 standards.
5. Depending on the state, the F450 can cost more to register and insure than the F350.

Rob

More stability with DRW, but you knew that. Gas or diesel? DRW and diesel make a nice combination on winding hilly roads which I think you have in your area. What is the weight of that 42 footer? I'm sure you understand pin weight, axle weight, etc. and how to figure out if the truck is suitable.

Price

The cool factor. I notice F450s.