IMO, to imply that a 5.4 triton or a 6.0 gm etc. etc. are inadequate in a 3/4 ton as ablanket statement is simply not the case. Granted, if you are looking to pull a decent size load down the highway fairly frequently, the smaller displacement gasoline engines tongues have a tendancy to hang out on uphill grades and merging, deep gears will help alot, but as they say, there is no replacement for displacement. Many folks in my part of the country buy HD 3/4 ton 4x4 pickups primaraly as winter plow trucks and fair weather drivers. The lions share of these trucks seem to be powered by the base model V8's. A 5.4 triton or 6.0 Vortec with an auto and 4:10s or 4:11's depending on the make will easily have enough power to push over a foot of wet snow with an 8 foot blade in 4Hi, traction on the other hand, will often be the limiting factor, not engine size. These trucks will do a reasonable job towing a trailer in a city enviroment, such as a landscaping or municipal truck application. It is with a trailer on the highway where the base engines will fall short when loaded to or near the max GCVWR. In these situations, a V-10 or diesel will realy shine.