I was sitting around doing a little thinking about another project and started crunching some numbers.then i read the posts on the paxton not keeping up with a modified engine build,which basically tells me the engine doesnt need it any more(or needs a bigger one)what would it take to make these engines produce 1.5 horsepower per cubic inch....naturally?i know they need pistons and such,but im talkin about the job of moving enough airflow to make 1.5 hp per inch.with streetability in mind 1.3 per inch 656hp should be a good attainable goal.527hp with a chevy 406 (1.30 hp per inch)is nothing to brag about,its a strong motor but nothing out of this world.The one thing i do see different(mechanically speaking) is we are dragging two more pistons.IM sure this post will get alot of attention and i would love to see some more NA builds with some big numbers.The knowledge is obviously here with some of you guys.