Right, the engine-gearbox connection is the hard nut to crack; Morgan sure failed at it.
From what I've read Phil Bleasey seems to have the coupling part licked; maybe I can adapt it, though it's not clear that I can do that without first having a Centa housing, which may prove hard to get.
Also I'm looking for more suitable alternatives, either one of Centa's other torsional couplings or another supplier's.
It sounds like your T-5 knowledge exceeds what I learned from my recent googling; would you happen to know which is the smallest bell housing diameter that it used?
I'll be using a Tremec T-5 with Ford bolt pattern.
Whichever that is, I imagine there's room for a lot bigger than a 5" or 7" clutch, and I'd be concerned about slipping from those mighty torque pulses.