GM crossram intake-valve cover interference

[VintageMusclecar]

Darren;

The repop intake has the machined relief just above the ports, but that isn't the area of interference--there will be enough room there once the valve cover makes it down that far.

The problem is that valve cover is binding up between the pushrod side of the rocker arms and the lip on the manifold base where the top plate bolts down. The only way they're going to fit is by finishing the factory partial reliefs on the tops of the covers the entire length of the upper edge.

I'm really appreciating the simplicity of a good ol' single 4bbl dual plane manifold right about now.