I have a 2004 ram 1500 with the 3.7 v6 and I want to to swap to the hemi. What all would I need besides just the engine and how much would I look at paying for the entire job?

 

You would also need the transmission, IIRC. The guys in 3rd gen section will know more. I will move ya there.

 

Full harness including PCM (that's EVERYTHING, computer on out); higher rate front springs for the heavier engine (I am assuming this 2wd?); the engine and trans of course; possibly a different driveshaft (does your 3.7 have the 45RFE or 42RLE behind it?); hemi radiator; I am sure I am missing quite a few things that others will throw in. As for cost, you're looking even with used parts (parts only with what I've listed) at least around $3000 - 4000. Then you have to find a shop willing to do it. Don't even want to think about what that would cost in labor.