Easy, Cheap too

Put the tail gate down an set two pallets of red brick behind the axle, Put it in low range, Max the R's and dump the clutch. Hee-hee It'd be an instant dump truck.

Oh! you want to do repeatedly,

Do a Short box, Cut out the firewall, set motor about as far back as you can (If not in the bed). Install above mentioned 1500hp motor, A Lenco Transmission and a Strange Engineering Rear end,then go talk to John Force for Tire recomendations.

Oh Yeah! Good long travel shocks up front.

Do 350's come in short box?