Looking for more 408 pull at the big end?

Airgap isnt going to hurt it at all shifting it at 6

Alright sir. I like that manifold so that works for me.

What gear and RPM are you trapping at in the 1/8th?

Going strictly by my brain recall - 3rd @ 5300RPM.

On the ported eddys. ...What final intake port volume did you end up at? That would help in your quest for top end by means of bigger cam.

I do not have that port data. We casually had a number but I did not gather a chart. Bigger cam would be a easy upgrade. But keep in mind that I am running a 1.6 ratio (magnum) rocker and my spec is from a 1.5 listing for that cam. I was under the impression that the 1.6 would give me a more aggressive end spec.