What is the correct 3/4" heater hose markings for a 1966 L79 w/o air? The TIM&JG initially states "they may have GM printed on them" Further down page 137 it states " the 3/4" hose is four ribbed with no GM or markings". Both the hoses on my 66 have GM markings. At my last certification I was docked a point with a notation that said "ribs". Preparing for Bloomington and wondered if I need to change out the hose. Thanks
Dan Lynch
54915
Dan Lynch
54915