Omg! I just bought a one owner 74 Dart with its stock 318 in it. Runs fantastic, but doesn't sound anything like that! Wow! I gotta change the cam and get some headers and badass mufflers on it! That thing sounds incredible!
I've had 2 340 Darts. The first one was a 69 GTS that I put into the 10s. The 2nd was a 73 Dart Sport 340 that I put into the 11s. Had to ditch those 8.5:1 pistons and go to 10.5:1. Wish I still had BOTH of them.