School me on Intake compatability, and modifications.

I just recently ended up with a parts lot of Gen 3 Hemi stuff. One of the items is an NOS Edelbrock 7528 dual quad intake manifold for 2008 and earlier 5.7 engines. This intake uses oring seals on each port face.

Can anyone tell me if this can be opened up for use on Eagle, 6.1 or 6.4 heads? If it can, i assume one would eliminate the oring type seal and use flat intake gaskets? This gen 3 Hemi stuff is new turf for me. I have searched the net and found many articles of 6.4 intakes on early 5.7 heads, using port adapters, but not earlier intakes on larger port heads.