I bought a chevy 1/2 ton with tow package got the v6 with manual 3.73 gearing for daily puller. I still have the f450 for heavy loads. As a rule of thumb a ford 3/4 ton will drink way more than a Chevy 3/4 ton. From what I understand you don't get any more efficiency out of the 350 than you do with the larger chevy v8.i really wanted to stick with ford but could not find a deal on a diesel 3/4 ton.
But i am content with the Chevy. here is a picture (link) http://www.lawnsite.com/showthread.p...=carmel&page=2