they are genuine build numbers. wouldnt have come from the factory like that though. the original builder sold the business a few years ago from what i can remember. genuine engines and all. ill see if i can find the specs.
There are two Walkinshaw limo's, Central Limosines where the people who origianlly built/owned them. Both are genuine Walkinshaws, and they have very close build numbers too by chance. They did not come form the factory like that, the limo company built them. It was a father and son who owned em both, one each. We ( my ex g/f and some friends ) where one of the first in the walky limo just after it was finished ( first one built was sons i think, second one was the fathers and was finished a few months later ). The son was also in our car club and would sometimes bring it on runs/cruises and has even taken it down Kwinana drags.