You have to put more than a few hundred dollars into a 318 before it can even get close to a stock 340 with headers so there's that it's funny how the 340 is still the measuring stick of all Mopar small blocks! And there's a good reason for that actually it seems really simple. A 318 will never have the reputation nor the mystique or history of the 340 no matter what kind of lipstick and money you throw at it great little motor it will never be a street legend. 340s took down some of the biggest baddest small block combos actually pretty much all of them on the streets and the track in the day, people love that about the 340. Not so much how cheap you can build horsepower. If that was all there was to it everyone would build LS's. When the 340 hit the track and Street in 1968 it was a dominating motor that 80% street big blocks couldn't even handle. that's what people love about a 340.