I looked at the pictures on his Facebook page, looks like a RPM Air Gap with a 1 inch spacer (?), can't tell the header size, but test was ran with mufflers, looks like the combo is working well. IIRC IMM's earlier TFS street engine was in the 460 HP range, so it looks like he has figured something out. Now as far as panic, yea, that was my fault, I'll go sit in my corner and shut up. Congrats on the engine.
Thanks, yes, it is an air gap manifold although I will be running Sniper EFI on it. The compression is either 10.5 or 10 to 1, don't remember. Told him I needed it to run on pump 91 gas if I had to.