Standard was 260bhp they only built one supercharged car for a record attempt 
If you're going to use a 'nerd' emoticon when you're touting 'facts' maybe check they're facts to start with.
'they' would be Roush who built the engine, not MG and it was hardly a production model.
There were quite a lot of supercharger conversions about, on the basis that supercharging a Mustang motor is pretty common.
If you're considering the speed record car an MG model the supercharged uprated ones are probably rather more production than it was.
The 260ZT-T idea has legs.
The VR6 Syncro idea also has legs, although I suspect the drivetrain would find its way under a more Golf2 shaped body before very long.
Possibly better than both of the above is to pick up a Locost and go racing with the 750MC.... or just drive the sh*t out of it.