Wow cool car. Unfortunately, only Rolls Royce has that information. I do not know how you cam to own the car or if you own the car but the it is my understanding that the buyer was to sign a contract stating only Rolls Royce is to work on the car. I could be wrong but I have never seen nor heard of a Rolls Royce repair manual offered to the public. And that is the only place I know of that would have the information you seek.