Dave, I would advise taking some measurements first!
Although it’s a short shift, the stick is obviously longer. The effects of this could be:
Fouling your hand when operating the fly off handbrake,
The higher turret: the Miata tunnel is a bit higher and has a secondary convex rubber boot. The morgan secondary “boot” is of course part of the tunnel leather trim and is concave; it sits well down towards the gearbox. So would the higher turret foul the leather and push it up so as to interfere with stick movement or at the very least look a bit ugly.
One final observation, they have done away with the nylon cup that sits on the tiny ball at the bottom end. Looks like they have instead, increased the diameter on the metal ball, so it’ll be metal on metal…all the more reason to make sure it’s lubed.