I think what youre saying is right...you can make good power, and there is even more potential that hasnt been tapped yet on Bseries. Whats even more impressive is that with such low whp you can get in the 11s, 10s, and recently 9s.
What youre wrong about is in making a completely ridiculous statement like 280whp with those modifications. Nothing is impossible, but 280whp NA ITSELF would be an incredible accomplishment, nevermind limited to some mild boltons. That is literally impossible. Thats like saying hey, Ive never seen a 600whp GSR running an 18g, that doesnt mean its impossible. Well, yes, it is impossible.