I've got a couple of questions as I try and clean up the air grabber install of a previous owner.

1 - I bought a vaccum can and was wondering where the factory mounted these on a 70 Roadrunner. I've seen pics of them up by the horn and also back by the firewall.

2 - what is the electric solenoid for wired in series with the manual vaccum switch??? What is it's function?

Thanks
Dennis