At this point I have the engine in but also have a snag. The gas flex coupling that connects the end of the trans tailshaft to the drive shaft has a larger bolt circle than the one on the diesel trans. Can I remove the part on the end of the tailshaft and switch it with the diesel one? I'm going to try to att. a pic to ill. my point but the is a nut type thing that has what appears to be an intentional divit in it to keep it from coming off. Is this correct and can I swap them out?