5.9L Magnum build with questions

I’m glad you brought that up, I was just talking to a machinist buddy last night about that. I will be opening up the flange area and blending a radius into the opening below the flange. I’m going to gasket match the ports once the gaskets and heads arrive. I forgot to mention I filed the ring gap bigger so I can run some nitrous or boost in the future.

Fixed my M1 / Strip Dominator

Heres the one i followed when i did both of my m1 intakes.