I am looking for a 2012-14 Ford cargo van. The issue is that it seems that 90%+ of those for sale are 4.6 liter v8. With a 4x4 conversion I just think that the 4.6 is a bit underpowered. Are there any 5.7 v8 available? What are people buying these days for Ford 4x4 van conversion? I've looked locally, truck trader and Autotrader.