Port my current M1 single plane or install the RPM Air Gap?

pittsburghracer said
Never touched an M1 so I would need some nice runner and plenum pictures to see if it could be improved.

Best I have right now For pictures. Also including the one showing epoxy as warning to folks with these. This manifold is for my 402 magnum and the factory drilled the inner holes too deep on 3 out of the four holes and they went right through, they will cause a vacuum leak unless those locations are actually being used.