whats the best engine for both performance and mileage??

Its actually pretty obvious that the LS motor is superior to every engine that ever had a mopar badge.

We enjoy these cars and engines for what they are. Most of us grew up with them and it is a hobby for us to make them the best they can be. With your logic i guess all the early ford guys should replace their flatheads with LS engines. What about the corvette purists, are you gonna tell them their Sm/Big blocks are junk and they should get rid of them. I guess Civil War reinactors should use AK-47's. I don't doubt your a ok guy, just not sure why you want to stir up trouble in a forum for cars that are what they are.