Honda Guys! Need Help Gas Saver Swap [CX/VX Swap]

^^^ that was wat kind of answer i was looking for. oh you might know this. if i were to go from a CX to a VX motor how hard is that? i know the vtec soleniod would need to be wired in…what else im thinking the ecu swap too from cx to vx right? and that should be it right?