I was interested in teh same thing about 2 years ago for my jeep. I asked around to a couple different shops. All of them said that if i was to get everything taht i would need together and all they had to do was the labor of putting it together, the labor would be between $3500 and up from there depending on what engine, etc taht i would be using and how much they would have to modify to get it to work. In the end i had a reman 4 put in, the whole process cost less than just the labor for the upgrade, now i just live with it.