Noooo - headwork like that not legal. I just got a local $300 head freshening - new valve guides, springs tested, head trued, etc.

But if you don't have a shop you trust, should their "level 1" be legal for 944 Spec?

Level I
Surfaced Deck.
Replace valve guides and seals.
Competition 5 angle valve job.

It's the "competition 5 angle valve job" that's problematic.
If you're going to send it out, use on of our sponsors - click on Bennington Motorsports on the left - Nick there has done a lot of heads for us in the MW, and was the one that inspired the steam vent rule change. Nick's great to work with, and LEGAL.

Is it the 5 angle vs. a more common 3 angle that is problematic?

I took a look at Bennington Motorsports heads on their site and it looks like they do fine work. Their site shows a head with "Intake port after light polishing". Surely this intake port polishing would be even more problematic than the 5 angle valve job?

I like his last highly technical step of spraying the springs with WD-40! I do get that the 5-angle job wouldn't be legal, I overall was just trying to use the process as a reference for my question. If I have it done, I'll go to a local shop.

I guess we need to define what is "stock" when it comes to valve jobs. The "competition" adjective implies more than stock, especially from Lindsey.