Sorry, but I disagree with the majority here. First, 1600 cc's is realistic with an aftermarket block and crank. I know there is a kit out there for this. Second, what makes higher cc's unstreetable? The cc's are irrelevant. Compression yes, but you can add compression to a stock busa and make it race gas only. Third, rideability and realiability, both would be fine, in fact great, if compression was kept to a reasonable level. Remember, I am running over 280 HP at the back tire and Ninja over 300, sadly, mine has not been too reliable, but several folks around here have 300 HP bikes that have been more reliable. Lastly is the HP claim... I agree that is not too realist for a back tire HP quote with just cc's, but that is entirely realistic for a crank figure, and very possible at the back tire with a shot of NOS....
Sounds like a fun kit to me, likely a lot less hassle than a turbo!