hi 'hawk
plenty of truck for a 25.
should be a great combo.
mpg is a tad lower, but the 2008 6.4 l diesel is NOT fuel thrifty...
it also has higher operating costs for maintenance associated with diesel.
the v10 has a tad MORE hp than the 6.4 but less torque, and NO turbo lag.
still it can haul anything a/s makes with vigor.
u will read about the "spark plug threading issue" on older v10s,
but my understanding is these last years of that mota don't have the issue.
gearing matters for mpg, revs and so on...
but any of the 08 offerings can work pulling a stream.
cheers
2air'
IF u like mag reviews or comparisons, heres an old one...
http://www.dieselpowermag.com/featur...sel/index.html