I am picking up a 90 Nissan with a bad lower unit casing on it and was wondering if any other models would fit. I have access to a tohatsu 140. Will this bolt up? I have read through the service manuals and there's lots of similarities with the 2 lowers but can't tell if it'll bolt right up and work. If not, is the casing the same since that's what's bad on mine and I could switch the gears over? Thanks in advance for any help!