Playing with the calculators..... Online calculator says 447 hp to run 10.99 in a 3000 lbs car ..... That would be with the ideal converter and gears, I get that.
So is the question 447 hp obtainable? That is 1.4 hp per cubic inch. I would think yes.
High compression, good heads, a lot of cam and a really good carb and you can get the 447 hp. Guys are making 600 out of stock stroke 340s and 360s. That's workable