Ok, I've always adjusted the hydrolic lifters on chev small block's when running.I have the clip's to keep the oil from getting all over,and a pair of cut out valve covers.Well recenly I've been working at a different shop and and they insist that doing a running adjustment will cause big problem's,wich I've never had any problems doing it this way.Of course they aren't telling me how they do it either.I've been doing it my way 30 years.Any suggestions?Tom