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A guy on MINI Talk rolled his JCW, but reckons his engine is toast, which I know it isnt, if I were you I would get a hold of his insurance agent who would then get a hold of the salvage yard, and you should be able to get a whole motor that is pretty much "screwed" for cheap.
I find that I arrive at the same logical deduction as Yucca, and can only presume that there would be engines both fore and aft. If it were my car, I'd be looking into a bigger fuel tank, too - most likely the running board kind that box trucks have. I'd be most impressed if both engines could be exhausted via a single, soccer ball cannon-sized exhaust directed straight up at the sky.