Posted about getting my 915 BB heads on the WEnd. Well, I just checked the exhaust valves with a magnet (cause they looked a little shiny on the tips) and they are non-magnetic...ie stainless (or plastic or wood). I am hoping that means that hard seats are already in place (please, please). I guess that means they may not have been 1.74's stock...they may have been installed replacing the 1.60's. Guess I will have to see if they are installed, then check the bowl to see if its been widend out. Lucky break on the stainless though...perfect for propane in the future.