^^^ yea i read ur who to blame thread i would say machine shop new there was a prob due to the no recipte, i really dont think the head was properly cleaned but also also think the last one with there hands on the valvetrain should have went through the head throughly but hey sh!Ť happens when u party naked lol. plus the flame travel is prob due to lack of octain and high comp just like the b16b pistons in a b series (just my opinion) idk. but hey would love to run ya at steele alabama or comicerce ga when we get them going lol just for fun.