Aside from the porting, which you can't just look at and "reproduce" and get the same results, I doubt there will be much to see in Blair's teardown. It's not like Kaase's out-of-this-universe bronze combustion chamber/head gasket idea, that resulted in killer power. So I'd be prepared to be let down if anyone is looking for a smoking gun as to why the engine performed the way it did, and hoping they can repeat the results. The devil is in the details, and those are not readily apparent when just looking at an engine.
The C4 heads have been known for a while to be the best factory FE head out there, aside from the performance designed MR, HR heads. So that shouldn't surprise anyone. Might be interesting to see if any port filling/raised runners have been done though. Other than that.....yeah, it's just a bored out 390 that kicked a bunch of Cheby butts. Nothing special