OK, keep in mind im not very knowladgable on Mopars, but the 360 would have a larger combustion chamber. Shaving the heads means removing the material from the bottom of the head uniformly acros in order to decrease the combustion chamber size. Usually, this is small enough to allow re-use of the factory intake. However, it may be needed to use a 360 intake to match up with the ports on the head. If not, than there should be no problems.