Mopar M1 Manifold Injector Bosses, Not Drilled Out

ross machine racing makes a drill bit specifically for doing EFI fuel injection bungs. I am going to be doing the same thing with my magnum M1 single plane. will be making a jig to replicate the spray angles and injector spacings from the factory kegger style manifold over to the M1 casting and reuse factory steel fuel rails.