The parts quality can vary - one of my friends ordered a stud/nut/washer kit and the nuts were so soft, I'm not sure they were even Grade 8. I prefer to use ARP stuff - it is by far the best and you know the quality is there. It may cost a bit more, but is the route I go.
I don't have my green book in front of me to lookup the part numbers, but here are two places that have a lot of quality parts:
Vanpelt Sales:
http://www.vanpeltsales.com/FH_web/e...prices-pg1.htm
Reds Headers (These are all ARP studs, which is only what I use):
http://reds-headers.net/index.php?ma...ort=20a&page=1