Setting up truck for dump trailer?

May be setting up a truck for a dump trailer. Would be local hauls. Under the 100 mile radius. 99% of it hauling sand. Thinking short dump trailer, where its easy to get into and out of tight spots. So if I go with a 24ft 1/4th frame or frameless.
What would be the best wheelbase on the truck?
What would be the minimum distance between BOC or Sleeper and 5th wheel kingpin?
I have a 1995 T600 now. It has a sleeper on it. Thus the reason of throwing in the back of sleeper above.
Truck has 624,000 miles on it. 11.1 Detroit,10 Speed Direct trans, single axle 2.93 rearend. That would be swapped out for a set of tandems. And better gears for pulling 80,000 to 88,000 lb gross.

Engine has been swapped from a DDEC-3 to DDEC-4. HP is 400 HP @ 1350 Torque. I know for most that is not enough HP. But hauled Hot Mix and rock for years. Using Tri-Axles dumps, and high HP was 350 HP with a cummins L10 and 855 cummins.

May buy a different truck. But hard to think of doing. As this one is sitting here, paid for in good shape. Pull the bed off it. Take out the single axle rearend. Put a tandem under it, with added frame rails. So as you can see, I can make the wheelbase what works best for this type or work. Not make something work that may not work good.

Truck would be running 6 or 7 days per week. Looking like it may well have to have 2 drivers. Used to be I would work both shifts myself. But with the limits today, don't see how I could get away with running it 16 hrs per day.

If you have any thoughts on what will work. Or what will not work. Please add them, I have never pulled a dump trailer. Dumped Thousands of loads out of a Tri-Alxe. Ran a few million miles OTR and local. But this is going to be new.
Pete

 

Thanks guys I always hauled 24 to 26 tons here in a Tri-Axle. But was not allowed on the Interstates. Quad Axles are not able to meet the Bridge law in Tn also. And being its 74,000 lbs for a Tri, 80,000 lbs with a Quad axle. Not worth it for the extra axle. Most around us run a 22 to 26ft Dump Trailer. There also limited to 80,000 lbs.
Only reason of thinking about a dump trailer over a Tri-Axle. Is I can pull a flatbed or grain with it. Where the Triaxle dumptruck limits you on so many things. When I was running a 1987 9370 Eagle with 16ft Rogers bed. Triaxle and one fuel tank. That truck could haul 24 tons of hot mix. Or 24.5 tons of sand or rock. The GMC Brigadier I ran was the money maker. That truck I hauled 26 tons of mix. Or 26.2 tons of other stuff It had a 13 speed and 16ft dump bed Triaxle with L10 cummins.
Reason for thinking about swapping out the rears on the Kenworth. I have a set of 3:55's I can get cheap. Local guy would swap them out for $1500. including extending the rails. Cutoff has everything I would need. Even 5ft of frame rails in front of it.
As for the 1350 Torque. I think it can be bumped up to 1450. But that is about all for it. It was ordered to pull doubles. So the reason of direct and 2.93's. But I used to run a Freightliner same engine. in the 90's. Even out west it done good. But it had 3:55's and a Direct 10 speed.
I keep thinking go with a Triaxle. One less axle to keep up. Most can't haul much more if any with the dump trailer. But was just thinking the Kenworth is paid for . But more work Less cash.
Found out this evening, there only going to run 12 hours. Not going to do the 2 shifts. So I can run it all myself. That would make life better on any truck. As a driver will not take care of it like I would.
This will be around 2 years of work. Then for me its over anyway. As that is all I'm going to work. Then its retirement and drive for fun.
Thanks for the reply's. As everyone knows always opens a persons eyes. When you get feedback from others.