the trail blazer intake makes the most power out of the stock intakes (and the same or better than several aftermarkets-- down low).
i'm in the same boat on fighting intake height issues with a LS swap myself, although with a different make auto that cutting the hood is not an option-- looks wise and because the hoods are cast from pure virgin rocking horse **** forged in an unobtainium fire fueled by hen's teeth.
but know that i'm feeling your pain on the: 3 or 4 bolt throttle body, injector height, fuel rails, intake height, cable driven vs DBW cocktail of options.