Jay, without sounding too naive, how will pushrod to intake port clearance be? Being these are more for max effort builds, do you have an idea at what kind of lift that interference with the pushrod becomes an issue? What size pushrods were you thinking of using on this type of setup, 3/8 or 7/16"?
I'm hoping to stick to 3/8" pushrods, and be able to tolerate at least 0.900" lift. I have an .880" lift cam that I'll be running on the dyno engine. The Solidworks model says that the parts as is will fit at that lift level, but if I have to adjust the machining on the intake adapter to make it work, then I will.
And by the way, I'm hoping that these heads work well for lesser builds, the idea being that the heads are so good that less cam and compression will be needed. It would be nice to have a 650 HP FE that idles at 700 RPM and has good throttle response. A really good cylinder head and the IR intake manifold will go a long way towards making that a reality. I will be building a 445 stroker dyno mule to test that all out at some point.