or you can go .48 and two 38mm waste gates (or one bigass one)
or you can go .48 and two 38mm waste gates (or one bigass one)
Two wastegates is not at all necessary for what this guy is trying to do. One external 38mm wastegate would do just fine, or even an internally gated turbo would do fine. In his case, I would go with the .48 A/R for quicker spool.