I took a 351w to a machine shop a while back to be rebuilt so I could throw it in my 95 gt and I'm starting to think I got shafted. The motor sat in my garage for a while after getting it back from the machine shop while I was saving up money for the rest of the rebuild. They said they rebuilt the heads but I can feel side to side play in the valve stems. When I rock the valves back and forth with the valves open slightly I can feel a defined side to side movement and see a small gap between the stem and guide. I've been told that there shouldn't be any noticable play so was I screwed over