another question, this tubular manifold doesn't look like it's got a place for an external wastegate, usually ppl that use these manifolds with stock internally gated turbos just put a blockoff plate BUT i haven't seen one on this manifold and don't feel like getting a new mani, and i wanna run a bigger turbo, so that brings me to my next question....

what's the biggest internally gated turbo that i can use?