Got a dually. added link to gallery to share my solution.

You will need the swing out brackets. You may or may not need and other extensions or angle irons
If you make something that permanently sticks out you will most likely be over the legal width limit. I addition to that, the permanently stuck out brackets will be in the way sticking out 8"-10" all the time.

Sounds like a nice C3500.

For some reason I am thinking swing brackets that stow out of the way would be a "cleaner" jack system than angle irons that leave the jacks stuck out... unless I misunderstand how they are set up ...

You might check and see what Gearvendors will fit that transmission. It will give you overdrive. You can sometimes find them on Ebay for around $1000 or less. Got one on my E40D. Love it. It will also let you split your other gears although with a 3 speed I can't see you needing to.

Ok, we have thoughts so I will share more.

This truck is for truck stuff, I will be in my car for most of my miles. Running empty I am getting about 9mpg, that includes the Cajon pass as part of my commute. My 1999 Silverado 1500 got 10 mpg with the camper but it was not in overdrive much and yes I know it should have had a smaller camper but I like others am learning. My 1500 was empty and stopped in traffic when it was hit by a car doing 70, it was a big hit. The camper loading certification label allows for 3200 lbs of camper per GM. Yes I know newer trucks have changed but this ride is paid for in full and has less than 63,ooo miles on her.

I like the comments how about tie down and discussion of using angle iron instead of swing out brackets. I weld some and have friends who weld some. Money saved on these items can buy fuel for camping.

Hi,

With 4.10:1 rear axle ratio and only a 3 speed, the engine will be reving up pretty high at 55 MPH. At 65, expect about 7 - 8 MPG, and less when the camper is on it.

Also the GVWR is not very high. 10,000 GVWR - If I recall right. That is only about 2,200 pounds of payload, about what a F-250 from 2005 to present can carry with single rear wheels. And with a 4 speed, the F-250 will get much better mileage. And with the 'normal' 3.54:1 rear axle ratio, or 'optional' 3.73:1 rear axle ratio, even if driven in drive (third gear) the F-250 would get better mileage, add over drive and it will improve a lot more.

There have been a lot of changes and improvements to trucks over the years. The new 2015 F-150 with a 2.7L Ecoboost is predicted to consume only $2,600 in fuel, while a 2014 3.5L Ecoboost in the same truck (but 900 pounds more curb weight) will only get 18 MPG and consume $3,300 a year in fuel. So the new truck is predicted to use about $700 less a year in fuel, and that makes it worth more money than the 2014!

At 7-8 MPG, your truck will drive you to the poor house quickly if you are putting 15,000 miles a year on it!

Good luck!

Fred.

My guess is 7-9 depending on how you drive and camper weight and size.

You can rest the tc on the bed while you add brackets. Most rv retailers have them including tweety rv. There are two different lengths. A few people have just added angle to extend the jacks.

4:10 gearing.......3 speed auto........454 big block.......mpg???

Fill up at chevron at hwy 138 and when you get to top of Cajon Pass go to Pilot Flying J (hwy 395) and top off for ride home-----might make it to Main Street :B
Just kidding----sort of.

That gasser will be thirsty due to gearing and only 3 speed tranny......10 mpg.
But it will probably get 10 mpg all day regardless of loaded or not.

Good luck with the new truck. I don't have a TC but mileage on my old 7.3 diesel is 10 mpg city, 16 mpg hwy, about 8 mpg with heavy trailer.