what kind of truck do you have? I would think that you would have to assume that this car is going to have problems just because it got repo'd and without a doubt the previous owner choose to treat it like crap in the end.
I would say go to them with a quote from a Chrysler dealer to replace all the parts missing on the car plus labor and then deal with them. Just keep in mind the price to replace some of the stuff that's already there
Chrysler Parts Direct - Chrysler, Dodge, Jeep Parts and accessories
have a lokk to see what an engine costs