Plenum design for intake manifold

[Truebeliever]

So runner length is about 7.5", runner diameter is 40.45mm at the head and is that until about halfway up were it increases.
In regards to the bias, here's a picture thru the throttle body.

IMG 7085 hosted at ImgBB

Image IMG 7085 hosted on ImgBB

ibb.co

 

[Truebeliever]

Intake runner diameter at the plenum is about 49

 

[culberro]

Intake runner diameter at the plenum is about 49

The head flange diameter and taper to the plenum is decent, definitely an upgrade over stock.