I've seen some units have a 460 instead of the V10. Will either pull our cherokee?
The short answer is yes!
I pull a car and/or an ATV trailer with my 21ft class C with the 460 EFI..It has more than enough power here in our Idaho mountains,more so than the 454's I have owned.Our local bargain shop guy bought a V-10..He does not like it as a daily delivery truck.Say's it lacks power compared..His opinion not mine but he does use it daily as a delivery truck.
Personally,I would stay away from any engine with noted problems such as the spark plug issue.Some have it,some don't..My luck,I would..My old 5.4 had the same reputation for spark plugs..Got rid of it before I had to find out if mine was one of the bad boys.
Older trucks and motorhomes run the risk of lack of maintenance..One with service records is a huge plus!Theirs more to an engine/drive chain than just changing the oil.
Good luck in your choice..