...You asked for Thoughts: Your not going to like this.
I'am with Doug! These Funnel-Web Manifolds are the equivalent of a 'Single 4 Barrel TUNNEL-RAM'.
(I) have never ran this Manifold...but I do have extensive experience with Tunnel-Rams (yes they were dual quads).
This I know, 'they' Do NOT 'come onto the cam' At less than 5000-5500 RPM. They will provide a 'Fuel Distribution' problem...#8 Cylinder Will go Lean. The posted Dyno Results Prove the Manifold is a 'Dog', off-idle, until one hits 5 Grand RPM. I've said before, this is another Manifold that belongs on the Racetrack! Running it on the Street will mean cruising at higher rpm's All the Time. You will be 'Racing' on the Street.
Yes! It does look Pretty...and the 'Wow Factor' can't be beat. 'Power is Expensive!' You will Pay Extra for it!
My thoughts,
MJ