Ok so somehow I had a spark plug fuse to the passenger side head and when I tried to get the plug out, the threads broke in half. So now I need to get the head off and take it to a machine shop. there is one in town that supposedly does good performance machine work, and I know they jsut don't do v8's and stuff. So my question is, can I take both heads to them and ask for a port and polish and they'll know what to do or do I need some spec's for them to go by? Also what kind of options do we have for upgraded valves and such? Thanks in advance.