Will any turbo be able to handle a higher load though, if not explain this?

AND heres the scenario:

I need a turbo that can run up to ideally 18-19psi without the need of removing the a/c or power steering etc.

I read an article in HCI and after replacing the camshafts, gears, pistons, and rods, this setup has been proven to run over 507hp/339lb-ft of torque with 24psi of boost safely on a stock b16 with these madifications. (also i plan to replace alot more than just these parts, these were just used in that specific project)

Im trying to reach a good 400 horsepower range without lacking cold air on the inside.

ANY help or suggestions would be great!