Pat ... fitted one to my Series 2 Landy back in the day ... really made a difference ... was lever operated which added to the passenger-intimidating forest of knobs and levers on the transmission tunnel as an added bonus.🙂
As regards Morgans, certainly amongst the 'Crossflow' era cars the mod of choice is the Type 9 five speed gearbox ... I have one in mine and it makes for a very pleasant driving experience.
K