There is an article about installing the SPA oil pressure and temperature gauge on the Morgan Three Wheeler Club website 5 Speeder pages, linked article May 2020 Bulletin. These are available to members only. If you are not a club member PM me and I will try and sort a copy out for you. I don't remember the power supply being a problem, just an ignition load supply. I think that I may have used the heated seat supply fuse, as I don't have that option on my car. As KBMOG says, it is a good and useful gauge and fits in well with the other instruments, unless you have a Heritage dash.
