I'm assuming your talking about the rubber motor mount pads, if so the 340 and 360 left(driver sides)steel upper engine mounts are different than the 318. You shouldn't be able to mix them up, try putting them on the block and then look at the K member to see if they will fit that way. I think the bubber mounts are interchangable or they won't interchange . try it and see


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)