A Friend of mine has the last set of 4.84 pso heads, and the last intake they built.
Somewhere out there is a ford video, showing what Bob Glidden was doing to his heads, in a part of it the guy explains how Glidden modified the w2 heads to be like his Cleveland based combo.
Are there any pictures out there of Glidden's W2s? Even a picture with the valve covers off? It would be interesting to see the extent of the modifications.