Done. Time to drop it off for machining and valve job.
I would say I have 15 hours in this head, spread over 4 days. I used 4 of the larger 1/2" diameter 60 grit rolls, 8 80 grit, 2 120 grit, 2 smaller 1/4" diameter 80grit and 2 small 120. I also found a place and use for all the carbide bits, glad I bought the 4 piece set and not just a tree shaped one.
Don't do this by cylinder like I started to. Because I used a spare head, I began by doing 1 intake and 1 exhaust runner not knowing how it would turn out.
Much more consistent(better) results will be earned by doing it in complete stages:
-All intake runners with carbide.
-All exhaust runners with carbide.
-Combustion chamber carbide work; de-shroud, short side radius, bowl work, whatever.
-All intake runners and bowls 60 or 80, ideally finish with flap wheel which I didn't have.
-All exhaust runners and bowls 80, then 120, then polish. (I jumped from 120 paper roll to 240 emery cloth. Something else in between would be ideal)