If you dont know better then maybe working on/changing cylinder heads isn't the best project to be taking on (research research research).
lluciano77 answered his question pretty well with his first post. From your first post it sounded like you were questioning the quality of gaskets from local parts houses and I was merely stating that felpro gaskets are the same no matter where you get them from (Jegs and Summit included).
Take it as you want but there isn't a reason or need to get upset.
Bringing history and technology together.