What is this?
 

This is at the end of a vacuum line coming from the T into the baseplate of the back of the carb on my 69.

I THINK it goes into a hose that goes into the firewall through a grommet with another hose and something else? If so, could it be the vacuum supply to the heater controls? And if so, maybe that's why my heat doesn't work, because i THINK the heater coolant shut off valve needs vacuum to ALLOW hot water to get to the heater core?

And, apparently it's exactly that, and that's the checkvalve. Man i hope this is why i don't have heat.

Man, you are on fire solving your issues. Give me your talent!

That is the supply to the vac hoses that attach to the heater control in the dash. I just hooked up that exact hose on my 68 and found it hissing on the inside.

Joe

IIRC from having the dash out last week, you can get to those hoses fairly easy by taking the glovebox out. There are like 5 in there.

I'm just hoping that the vacuum heater shutoff valve needs vacuum to OPEN and allow coolant flow, otherwise that's not my no-heat issue.

OK, i had a leak at that shutoff valve (repop tower clamps.) Replaced with worm gear clamps, filled up coolant, and connected that vacuum hose. Success! Great heat!

But the blower wouldn't work on high. After 15 mintutes of research, i figured out there was a blower motor high relay. I tested it, was good. Found someone had a 2 amp fuse in the lead behind the alternator. I think it's supposed to be 20? It was blown. replaced, and all speeds work!

Horn doesn't work. Tracked down to a bad, newer repop relay (the delco stamped one.) Key buzzer didn't work either, took column apart to look into horn, and the buzzer switch connector thing is missing. (People, just unplug it at the firewall if you don't like it!)

Anyways, tested there and it works if you short it manually. So i have a buzzer switch, ign cyl (mine was sloppy), and horn relay on the way and those are knocked out. Got a glove box light on the way since mine is missing, two new hideaway covers since the plastic is severely damaged where they mount on mine so i can't adjust them for better alignment.

Headrests are getting recovered as we speak, need and alignment and A/C charged. Have to look into a drivers door window rattle when it's down, and sloppy door handle engagement, and a repair on the drivers side roller hinge.

Then i think...gasp...the car might be DONE?!