I know this isn't a IDI ? but you guys seem to be up on this kind of thing.
I have a Sterling rear end that came in a single rear wheel 3/4 ton out of a 95 model. ? is will one ton wheel bolt up on this rear end by just adding longer studs. I know that there are Sterling rear ends in 1 ton's and that Ford had two different bolt patterns for 1 tons. I ran into this when we "at work" got a new ton a few years ago and the spare wouldn't bolt up on the truck. I am thinking the cab and chassis HD have a differen't pattern for the same amount of studs then does a ton that is a regular truck. Not a HD.

I would like to put duals on thisd rear end if it isn't a big deal, like changing hubs.

 

I don't know if this helps, but we have a `90 f450 and a `97 f350. They both have the same size wheel and tire size. But, 1 has a 10 lug pattern, the other has a 8 lug pattern.

 

The dual wheel will bolt right up no issues. Those axles were set up for both thats why the rear studs are so long. The front hubs 4x2 or 4x4 will require and extension. The only difference would be if the axle came off a duallie pick up truck model which is 4 inches longer brake plate to brake plate. But your axle as it sits will work fine for a dump or flat bed. (duallie) As long as your using 85.5 to 97 wheels.

 

I got to lookin again and the only thing that is need to look into is will the inner tire hit the springs?

 

Best bet is to put a set on just to see. Those axles were used on single wheel pick ups and cab and chassis model which were (rough figures) 37" and 34" wide respectfully. The pick up frame is a little wider so the duallie version would come with axle shafts and tubes 2" wider each side (rough figures). I have seen adapter plates offered on the net to step out the rear axle hub. They bolt into the existing lugs and then you bolt your wheels to the adapters.

 

The 8 lug bolt pattern changed between the 97 (6.5" x 8 lug) and the 99 (170mm X 8 lug) model year.
All the previous wheels should fit up to the 97 model year.
The 99 to present all have the metric wheel pattern.

The axle housing on the Sterling came in two sizes with two different spring perch locations on one of them.

The short axle housing can run dual wheels on a cab and chassis truck with a 34" frame rail width.
The housing is 53.75" wide measured to and from the raised outer portion of the back plate by the brake drum.
The spring perches are mounted 1.75" farther from the brake back plate on this axle than what they are on a SRW pickup.
A pickup had a pickup box mounted on the frame when it left the factory, the frame rails are 37.5" wide.
This axle is also 53.75" wide back plate to back plate.
The narrow axle on this truck frame can only run single rear wheels because of inner tire to spring clearance.
The dually axle on a truck that left the factory with a pickup box has a 37.5" frame width and it can run dual wheels because the back plate to back plate distance is 4" longer than it is on a single rear wheel axle.
The dually axle measures 57.75" from back plate to back plate.

Yes you can add spacers and run dual wheels on a SRW axle, but your reason for wanting to run dual wheels will decide if this is a good idea or not.

If you are after the extra stability for towing a trailer, the spacers will be fine, expensive but fine.
If you are after the extra weight carrying ability of dual wheels, the spacers are not the best choice. By moving the wheel center 2" outboard with the spacers, you are causing an uneven bearing loading.
Most of the weight will be carried on the outer bearing alone instead of divided between the two bearings.
If you are loaded very heavy the inner bearing may actually have it's loading on the top instead of the bottom where it is supposed to be.

Also remember when you run dual wheels, you will be limited to running 235/85-16 tires because of the tire clearance between the tires. Wider tires will rub between the tires causing excess heat build up resulting in blowouts.

 

The spacers will be easy. I can make them. I am adding duals for floatation in fields. If I need to carry that much weight I will use a dump truck and trailer.
I need to put a lift under the rear end to make the truck run level . I did some front end work and it sits higher now. I may move the spring location and put them under the frame instead of in their normal mounts outside of the frame. That would get me real close on the lift I need.
This truck as been interesting.