I can't even get a turbo to survive 25psi, much less 33psi. They keep puking the turbine seal. That is with T3s pushing more than 300hp at the flywheel, which I guess is a bit off the compressor map.
Go get the recent 5.0 mustang magazine. It has the King of The Street compeition. It has a guy with a STOCK LONG BLOCK putting down 917rwhp with a hellraiser kit.