Most high output alternators won't produce HALF of the 275 amps you're going to need. Think about this: Even if you were to find such an alternator (or possibly run two, with the second on a custom bracket & belt), you're putting more load on the engine which will reduce horsepower. On top of that, you're talking about adding 2 premium deep cycle batteries at 50 lbs each. $400+ in alternator(s), $300+ in batteries. There's no such thing as a free lunch.

Could it be done? Eh, possibly, but I'd personally go with a proven power adder (traditional turbo, laughing gas, etc.)