A hemi in the Avenger would be awesome. It would take alot of work and cash. The first thing you need to do is find a donor car for the engine, trans, rear and electronics. It would be entirely possible because, I don't know about the newer ones, but the 08 used the same chassis from the fwd to the awd. So the driveshaft hump and opening in the rear for the diff would be there. You could check and see if the Charger rear chunk would accept the Avenger shafts, if not then you would have to shorten the Charger shafts. To keep from setting off the check engine lights you would have to pull the ecm and the tcm from the donor car. You could also pull the engine and trans mounts from the donor. As far as everyone is concerned about, "It would be cheaper to get the V6 model", where is the fun in that? People in the hot rodding community have been doing this stuff for years. How do you think they came up with a KIT to put a 5.0L Mustang engine in a Mazda Miata. I say go for it!!!! If I didn't have to depend on mine for daily driving I would probably try it myself.