Towing a 39' TT across country? Possible or no?

As a 2000 Excursion owner, I would dispute a couple things Tim/Amy says about them. This of course wanders from the original subject. :)

IMO, the V10 pulls trailers up mountains just fine, though I will agree the 4.30 gears are a big improvement.

The head issue is don't improperly install the spark plugs or else they are prone to being ejected. The transmission is the same with a V10 or 7.3. I wouldn't call them particularly weak, but they won't last as long as either engine.