Won't be able to answer all your questions but I've had 3 plus 8's before my Aero S1 and to me although vastly different to a trad Morgan it felt like a plus 8 on steroids. Same kind of feel and view over the bonnet but far far more exillerating to drive and extremely surprising. Most of all compliant.
Definite upgrades have got to be short shift and sports exhaust. Job done....a perfect sports car.
Congratualtions.