And So It Begins....

Jim Kueneman said

Yea, it was clear getting HP out of that head NA is an effort in futility. You can get torque out of it with some careful effort. If you open up the head to flow like a quality aluminum modern small block head then 300 is in reach.

Click to expand...

And that's the mystery. All the numbers I gave you on the unicorn head were PRE finished valve job and included no back cuts on the valves, so the head flows more than those numbers represent. I'd rather stick with those numbers and end up conservative, than guess. Naturally aspirated or not, it'll be fun!