I have a 2002 xlt with a 3.0 in it and i want to swap engines for a 4.0. are the motor mounts, computer, and everything else compatible for both engines?

 

You will have to get PCM for sure the 3.0 is a Mazda design and the 4.0 is Ford so id imagine there are quite a few differences what trans do you have? if its 5 speed you will need a trans if auto have to change the bell housing.