my slant buildup

Summit sells Valve Spring Height Micrometers for around $50.00
With one of those you will be able to determine how good of a job the machine shop did getting the seats all the same height as well as be able to determine what valve springs match up to your head and cam.
I forgot to grab it at work but I was gonna start with a 6" machinist rule and see what heights I have at present. Eyeballing things they look nice and even to this point. I haven't had a chance to really critique their work yet. I was also gonna set a straight edge across the valve tips and see what they look like from that aspect.