The shop that did my Eddy RPM heads left some scraggly bits around the valve guides. It didn't sit well with me and I remembered a comment he made about really hard exhaust seats. A quick check with my straight edge showed a .014" variance in valve height. Not perfect but not a crippling variance. Those things left me feeling a bit unsure so I popped a couple valves out.

Most of the work looks pretty good to my untrained eye. Being a machinist I know what I'm seeing in metal but have never ported heads.

I will caution the unknowing by saying machined metal rarely photographs well. There are some hollows in the casting that didn't clean up but that's Edelbrock, not the porter. The flaky scraggly bits are the porter.

The seats are very nice without any sharp edges or ridges.

What do you folks think about the work done?

Intake

Exhaust

I'm not seeing anything that would bother me. Sometimes the temptation is there to remove any evidence of the casting but that's not necessarily a good thing. The fact he left some of the casting flaws alone would indicate he has some knowledge of how far is too far. The exhaust port looks well done around the guide. On the intake its nice to have a sharp transition around the guide, but that can only be achieved if the material is there to work with. Doesn't look like its was.

The bit that bothered me was the flakes of aluminum coming off around the guides. On a few ports there are flakes of aluminum left flapping in the breeze. Those are the bits that should have been cleaned up by hand before assembly.

Most of the work looks really nice but I don't know all the little secrets that improve flow.

Looks pretty good. Except the thin flakey pieces around the valve guide on intake and exhaust. I believe i would try to remove as much as I could. Rather than risk it flaking off later

Obviously that would need to be addressed imho.

Overall, the CNC work looks good, apart from the obvious cleanup of the flaking aluminum. I'm not impressed with the valve job, looks like just three angles from the photos, I like to see a fourth bottom angle.
The other thing to check is to make sure your chosen gasket doesn't overhang the combustion chamber anywhere, I hate it when they blow out the chamber around the valves so the only gasket you can use is one for a 4.500" bore.

The areas around the valve guide you pointed out, will disturb the flow very little, in my experience. In fact I have seen move harm done taking too much out around the valve guides. Air hates the port to get bigger and then smaller. A port is a complicated shape, and it is hard to tell sometimes if that is what you are doing when porting.

What I would want to see is flow test numbers before the work and then numbers after the work, percentage of flow intake compared to exhaust, and some velocity numbers. Those things are what I use to determine a decent job. On the flakes, what was the understanding on who was going to assemble the heads? No they are not ready to assemble without cleaning, and maybe touching them with a sanding roll. So was the work was a combination of CNC with somebody finishing it with hand tools?
What few heads I do for other people are done by hand, and I tell them up front if you want pretty, go somewhere else. I give them the numbers mentioned above.

The porter assembled the heads as per our agreement.

Yep. I had to go to 4.500 gaskets on my 4.375 bore to clear the chambers.

I like to blend the bottom cut on the seat to the bowl, also its hard to tell from the pictures BUT I like to lay back the short side radius on that intake port, & also I like to lap all the valves, to make sure there is contact 360 deg on the seat. that said some sandpaper roll work & a good cleaning .

It looks like he spent some time lapping the valves. I can see the change in surface finish on the valves and seats. That looks thoroughly done.

If you have them apart, insert a valve in the guide and drop it. It should bounce several times if everything is concentric.

Kevin