I have a new ATS Manifold with a big foot flange, that has not been drilled for the turbo bolt holes. I believe they used to sell these back when the H2E's were common with their oddball pattern.
you have had that thing for a while. I remember in '02 when the H2E was the baddest around for a 7.3
let me check with my local machinist on what it will run to get holes drilled and tapped. I would just end up screwing it up without a proper drill press.