Thanks for the info, I did not think they where interchangeable but was hoping.
I got the truck cheep from some one I know, looks like they got screwed over by the shop that did an over hall on the engine for them. (they got the work done but have had it parked mostly before I got it as they got a new car)
I got the truck cheep enough that even with replacing the engine I will still come in at around 1/2 the cost of buying one in good running order based on local Kijiji adds for Durangos
What is a good price for a good 4.7?
I found 1 for sale for $2300 (more than I payed for the truck) with a 1 year warranty.
Seams steep to me so I am going to call around to see if I can get a better price on Monday