Dropping a 390 into a 58 Edsel and buddys shop. Having brain fade, Mounts we got only havre one stud. Mounts are C ahape. Does the open side go forward or back. Car had no engine when he got it and doner engine is out of 69 Galaxie with new type mounts. It looks like the left side mount will hit the left manifold ( have no ides what manifold came off of) if we put the open end forward. Wrong manifold????