[1QuickS]

I sell PMO parts if interested. The normal PMO intake manifolds are about 5/8" taller than OEM which makes installation of the OEM air cleaner an issue for lack of headroom. You can remove the sound pad on the ceiling of the engine bay to gain clearance. K&N filters work even with the tall PMO manifolds.

However, PMO will not sell insulator plates to bridge the notch. This is due to the real possibility of the phonelic warping (unsupported over the notch) and creating an air leak which would burn valves. You could make aluminum adapter plates that would bridge the area and use silicone gasket material to seal.

Also, you could place your manifold onto the head and mark the flange to see how much overlap you have with the notch. A 1/4" overlap is probably good enough to reliably seal.