I know TLowe was going to do some testing on the heads lumped vs. bossless vs stock bosses. Did that ever happen?
Yes, there were several tests done between a lump vs. boss-less head, and a tapered boss vs. stock boss head.
Just installing big valves in the head, but not removing the boss gained very little HP, tapering the boss showed no additional gain, removing the boss altogether gained 30+ HP, adding a lump gained more....
