Statically, by far the best way to adjust Corvair valves. Dennis At 07:26 PM 4/17/2004 -0700, lloyd biggerstaff wrote: >I JUST REPLACED THE HEADS ON MY 1966 MONZA.THE MANUAL SAYS TO STATICALLY >ADJUST THE LASH.I HAVE BEEN TOLD TO DO IT WITH THE ENGINE RUNNING.WHICH >ONE IS BETTER?