Not necissary but not a bad idea either, main reason I say that is there's nothing supporting the front of the trans beside the engine, if the engine is removed without the trans the trans must be supported up front. It makes constant assembly disassembly easier plus adds more rigidity. Engine is also supported better than just the 2 motor mounts, I guess it really depends on how hard you plan on beating that thing up. More work though.. Was just curious.