Steve, thanks for the information, it is most useful.
When I was talking with S&S and inquiring about doing the Muscle air cleaner and the Mk45 pipes/mufflers they indicated I would need a tunable ECU and they suggested G56.
No what I am hearing, from more than one person, is that the MMC ECU will work and if I get a Windows laptop I will be able to diagnose what went wrong, just not be able to do much about it.
I have engine code readers for my Mini Coopers but apparently Morgan is not offering anything like it.