At the present moment, I have a 2005 Dodge Ram Quad Cab with a 4.7 liter engine. How difficult would it be to replace this engine with a 5.7 liter HEMI? What changes would I have to make? Wiring harness? Transmission? Thanks.

 

Check threads on here. Lots of people have done this swap.

 

It's been done, but it's not simple.