Looks great Tony!

Please be sure to go the extra mile onthat 440-2d manifold and port the transitions from the lower plenum to the runners.

Look up the old Dr. Air article. The upper plenum is great as cast and really only needs the MW port match, the lower Plenum needs some work to get the runners to match the uppers. Upper plenum will flow around 360 with just he port match and easily keep up with your EZ heads, the lower plenum will only flow maybe 320 cfm, the #7 is the particularly weak one but it's pretty easy to fix.

With only the runner work and not doing the plenum work as well you're leaving about 25-30HP on the table of the manifold's potential.

I agree with Ron, you may need to mill down the cross-over to clear the indy valley plate, or you can grind the valley plate where it makes contact. It may actually clear with minimal work on an RB, but on a B deck like mine with Stage VI's it was mandatory.

Well worth the work to port the plenum, I can walk you through it, I actually went a bit further than Dr Air and ported the heck out of my 2D, both upper and especially the lower.