blown head gasket 408 stroker

did you happen to have the machine shop install hardened valve seats? I had a head ruined by a machine shop that did this, as they cut into the water jacket on number one cylinder, and then just used RTV and pressed the seats in anyway, and said nothing. Well 10 min. after I fired it up, one cylinder was sucking in antifreeze from around the seat. (Steam out the left header) Man was I P.O.ed . I made the machine shop replace the heads with another set of X heads. I will never use this shop again!