Thank you for posting. I watched the Youtube video and even found another thread from your post highlighting a 620 HP build using Roller lifters on the A Engine.

I remember seeing these Airwolf heads advertised through MCG a while back. I attempted an on-line search for information about them but came up mostly empty-handed.

The dyno-sheet is very impressive for sure. Is there a website with dealer information or even Flow Bench Data and close-up images of these heads ?