Intake Manifold Dilema

Heli-coil would be the best with the aluminum but those are some big NPT threads and it's gonna be expensive for the heli-coils. Honestly that intake isn't that great and if you want a single plane I'd go for an M1. I didn't lose any bottom end with it and I really think the M1 is the best all around single plane for the SB or if you want a dual plane get an Air-Gap.