Interesting; I as told that doing a gasket match on the hotside won't net any flow at all.

Edit: Is the gasket match data for gasket match only or on top of the smooth + thin data?

Whoever told you that either has a very poor understanding of how airflow works or didn't even spend 10 seconds looking at the head. Stick your finger in each port and feel the first 1/2 inch of the port all the way around. It'll become pretty obvious how gasket matching that area picks up as much flow as it does.

On top, done in stages, so the chart I posted reads chronologically.

Well shit, it was someone known for their headwork (I guess) that completely ignored the fact I wanted the head gasket matched the first time and shipped it off without even touching the exhaust side.

the answer is ALWAYS gasket match.

I would have assumed so as well.
I guess I should have specified and paid extra for it.

I haz teh cutaways. Pics to come after I get them cleaned up.

waiting news from you sir

2 years later and no cutaway pics posted. I guess I’ll post one then. It’s of no significance though. The cut isn’t aligned with any particular port so you can’t really get a good idea of the shape like you can the mold created by Mazdazilla6.

As mentioned earlier in this thread, the intake ports are angled, which means the cut would need to be equally angled to get a good cross-sectional view of the port.
With the exhaust ports merging to a single runner, it would be even more difficult to get a cut that reasonably represents the port shape.

Back again and hopefully I won't muddy up this valuable thread.

In the OP, @Mazdazilla6; said the testing was done at 25" H20, but @Enki;'s summary of the flows shows 28" H20. I'd like to think the screenshot "should" say 25".

Okay. I did some porting to my head.
Intake: Mostly just cleaned up the cast roughness in the runners, did a mild blend and rounding of the intake port inlets because i'll be going to a FoST manifold which is undivided, and I removed quite a bit of material out of the bowls..mostly the small runner bowl. Considering I didn't open up the runners at all aside from smoothing the rough cast and the flow went way up, I can only assume that the velocity increased as well which is fantastic!
Exhaust: same rough casting cleanup work without any heavy removal in the bowls other than smoothing out the transitions. I did go with +1mm exhaust valves but it was for nothing because i didn't open up the throat just below the valve seat. I really don't feel like taking the head apart to do it now. It's all pretty from the machine shop. Looks new.

NOTE: I need to confirm what vacuum value the flow test place used. I'm guessing 28", but I need to be sure. I found something online that says how to convert my new flow numbers to 25" and it claims to be mostly accurate, so I'm posting that graph with that assumption.

Edited to add pic of clean and assembled head.