Do you have any literature with this for a 67 or older? All my micro-fiche and paper literature are at our other home because of the extreme wild fire danger where we are. Been relocating stuff for a while. HVAC sounds kind of fancy for a vehicle that did not have a Air Conditioning option. HV would have covered it. Maybe
@wscbill can post a picture of the sub section diagram if there is one. Personally think Fig 47 is all there is. A-D seems to cover all the controls in the bracket under the dash. The blower is covered as well. But the knob in the face of the heater itself does not have a line with a letter saying it's a separate part. All the damper for defrost is not covered either. It shows the defrost vents that are in the windshield just a shadow which probably means it's on the windshield diagram. Would really be surprised of anymore detail or sub section. Pretty simple in the sixties. My electricial manual for my 2000 LC I had is as big as the whole FSM for my 89 LC.