Welcome to club of getting shitty work done to heads. I just found out the shop that did my heads fuicked them up. The guides were 7 thou out between end to end this is with about 400 miles on them.Then I found out the valve stem height was about .063 high with a non-adjustable valvetrain. The guides are stock just knurled. That is about all I can think of right now. I was pissed because I worked there to. I had about a $700 in them heads.