Too bad it probably flows about as good as a round port with all the emissions modifications it has had. You can't even port these out aye?

Almost thought it was a H89:

H95 Swirl Head

Nonetheless a cool thing to have in your cupboard.

Its a strange one because the chamber are very deep meaning the valve seats are very high?
That would mean the port angle is not very good perhaps making a right angle turn.
Alot of Shrouding would make it a pollution head.
I wonder what model had this head?

Swirly swirly. I like it, its a naaaiice.