Only 5.9 mag I have is in my '01 Ram.. LOL. I have a 318 mag on the stand, supposed to be a good motor. I was going to put the 318 mag in my '74 Duster just for a driver. That's why I ended up with the reman heads, Eddy intake, and stock roller cams with the snout. I ended up doing the low dollar 318 project instead.