Have emailed the seller advising him that according to the engine number its a 4.5 litre. Got a response espousing the virtues of the car finishing with a "its a 3 speed auto and are you sure its a 4.5 litre?"
So I requested a picture of the engine and said that if it has blue injectors its most likely a 4.5 That was a few days back and I mentioned that I wasn't really interested in buying the car, just wanted to help positively identify the engine, as he probably has a very rare car and it would be in his interest to advertise the fact of the bigger motor.
As a performance car enthusiast I would buy one with a bigger motor and euro headlights over one with a smaller motor and american headlights, if you see what i mean.
If I hear from him I'll post his response.
Ian.