1972 Vega - I’ve a Vega with A/C and I’m swapping out my heater core. Got rid of the A/C part. Got the heater core out but noticed that there is a vacuum line that goes forward and out the firewall and under the hood. I’ve no idea where to hook-up the vacuum line. I believe this vacuum line controls the opening and closing of the ‘doors’ in the ‘box’ that the heater core is in. I’m considering just hooking it up to one of the ‘ports’ coming off the intake manifold but I’m suspicious that is not correct.
Can anyone give me suggestions as to where it should hook it up to?
Thanks!