5.9 Magnum into a 73Duster

Old geezzer, when we finished the 360 smpi 74 Challenger it had TTI headers with duals, a dakota cold air and under drive pulleys for the V belt and that car really went good. I would say it went better than my 73 340 Challenger. It had just the stock computer and with the 518 and it will do 25 MPG on the highway, in an A body a lighter car it would have to at least do the same. We did have some trouble initially but it wsa do to a bad connection on the wiring harness to the map sensor other than that it started up and runs great. The only problem you will have is the back of the trans on a 518 is larger than the car will except so you will need to do some tunnel mods.