You can't get the tires to smoke with a 5.9? Hmmm... OK. What all has been to the motor so far? Also, do you know what the running gear is?
On a side note, don't quite see why you can't get the 5.9 to fry the tires, I worked on, and drove a Ram 1500 third door 2x4 a little while back, nice truck. Nothing really done to the motor, stock, with aftermarket dual exhaust, had regular street radial tires with bigger than stock aftermarket wheels (nothing idiotic I'd say, size wise that is, maybe 18" wheels)... Test drove the truck, god down the road from the shop, and without meaning to, it spun the the tires, and I even saw some smoke from the tires... Bad thing is, I wasn't really even pushing it at all... I wanted the truck (it belonged to a used car dealership) tried to talk with one of the guys that worked at the place, but couldn't even get the guy to look at me... So someone else ended up with it.
If this truck did this with a stock motor, I'm sure we can arrange something to where you should be able to melt the tires... LOL.