Sounds like a cool deal Doug....NSS =
Why not pull the e-heads and have them port matched to the ICH MW manifold as was mentioned above ? It should still easily run the 10.50 index i would think.
Then when you do the big cube combo you're all set on the intake side.
The A&A crossram is another option and it would bolt right onto the std port e-heads but then you would need a new intake when you build the big cube combo. The A&A piece is expensive as well but would provide the path of least resistance.
Ron
Ps. Merry Christmas