An imposter. As I recall, the Brough Superior had a V-Twin engine, and all JAP-made (not for "Japanese," but for a corporate entity that still exists) engines are vertical singles. You can find them still as the powerplants for "speedway"-type racing bikes.
Hell, yeah, it would!
Or how about the NS750 from the 1980s, with its funky oval pistons?
I swear, the Japanese have made motorcycles into technological art.
Yes, a Norton Commando 750 (the 850 from the mid-'70s was milquetoast). I prefer the 1972 Norton Commando--black with gold pinstriping and a hydraulic front disc brake.
As for the bike of Beatty: I would have to screen the film again. Remember, the Bonnie featured two carburetors, while there...
This assumes unlimited funds, a spacious and heated garage adjacent to a Malibu ranch house overlooking the Pacific, and superior contacts with whom to locate the specific machines. First off, I would have a stable of current-model machines because they're so damn good, and I don't want to be...