if you're under warranty still on your sc, then no it's not a good idea. if your warranty is up and you're looking for more power, then yea i guess. it all depends on what your power goals are. and make sure you get a good tune or you'll blow it up. yes you can swap the parts from your LSJ to any 2.2 or 2.4. but again, make sure you get a good tune. my 2.2 blew on me with my supercharger set up, so i rebuilt it. if you swap them to base model, get a good tune and don't go smaller than a stage 2 pulley