how much would it be to completely change out my 3.9 for something other than the 5.9 that would have alot more power?

 

depends on how much dependibility u want......im looking into 5k for a complete engine trans upgrade(but i already have a v8)

 

depends on your ability and how much fabricating you want to do, and technical background with wiring.

 

if your good with wireing. I would do a hemi swap. it can be done for around 5k if you can fabricate your own stuff and good at wireing. or ou bould do a 4bt 3.9 diesel swap. and get 30+ mpg outta it with a hell of alot of power.