And yes, the engine of my first roadster from 2005 is the ST220 engine, the closest one to the mentioned Jaguar engine, I guess.
Heinz, I knew you had a soft spot for the NA MX-5. If I believe correctly, your son has one? I've now owned two - when when they were new and a second decades later, as a trip down memory lane. Neither disappointed. As a car, it is hugely capable and all too often dismissed by many.
As for the AJ30, like you, it is my understanding that the S1 Roadster is the closest to the fettled unit that Rocketeer use. I also thought that
Basset Down Balancing may be of use for Roadster owners in the future, as they seem to know this Ford V6 very well. It is definitely an engine that people speak well of and the Porsche / Cosworth development is often mentioned.