Intro to a port job

All the bowl and port work in the world is meaningless if the seat geometry is jacked up. I'm with Moper, for the cost of 16 insert seats and a correct valve job you should be able to find a set of better castings to build on.
If the work shown is questionable - makes total sense to me to throw them out. I'd bet if they went to my head guy he'd be redoing the guides too because I'd bet they are not done well enough for him. So IMO it's just not worth it. Not that "me" matters here, just sayin'.

I guess I misread the post intent. I thought it was about porting - so I looked at it. This is about resurrecting a wreck a shop created. In that instance - I would throw them out and move on using whatever small parts I could.

I'm in one port so far.
At the point you end up having three or four hundred bucks into a set of heads and then find out how the machinist got the installed height spec of the eddy springs "these are in @1.805" was to sink the valves 'creating more work' to reverse the negative effect it had on flow and at that do a lawnmower seat grind 'creating even more work'... it takes the wind out of your sail. We will explore the cheapest, practical route and realistic potential of what's to work with and decide.

To all of you... if you have work done at a machine shop, look into what you're asking them to do and ways to do it before you just hand it over and say "make this work".
Many ways to skin a cat isnt always good.