I have a 73 Challenger that had a 318 LA and 904. I am putting a 1995 360 Magnum into it and have rebuilt the 904 to heavy duty specs. I need the proper motor mounts to secure it. I know the left side is different 340-360). Roseville didn't have anything...and suggested I contact Mancini Racing, which I have via e mail. Pretty sure they are the PolyLock versions at Mancini. I do not have the metal "ears" from the original 318 mounts. Have heard that Schmacher makes the 318 to 360 Magnum...
Rubber engine mounts needed for Magnum 360 swap
Rubber engine mounts needed for Magnum 360 swap