5.9 Magnum Torque motor build?

I have a 1983 dodge d150 4wd 4 speed has the 318 ALL stock. I'm wanting to make a low end torque grunt street vehicle on a $2,000 budget. I've talked about it and thinking about swapping out to a 5.9 Magnum.

On the 5.9 Magnum I want to know what I can do to get more lower end torque abstaining from a stroker build? how much can the rear and trany take?