Headers are IN !!!!!!!!!!!!!!!!!!!!!!!! it was a total piece of cake. These things go in so easy it's not even funny. There are some little querks. And they are different than the one in the old pictures.
I bought ARP hex head bolts. One on each side had to be trimmed slightly so the headers would slid on. This would not be a problem with plain flat hex header bolts.
Look for the install thread.