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72 roadrunner firewall hole #1381886 02/05/13 06:25 AM 02/05/13 06:25 AM
Joined: Jan 2008 Posts: 39 AR 7 70_roadrunner OP member
70_roadrunner OP member 7 Joined: Jan 2008 Posts: 39 AR	What is the 1 1/4" hole beside the A/C drain for on a 72 roadrunner? This is to the right side of the drain.

Re: 72 roadrunner firewall hole [Re: 70_roadrunner] #1381887 02/05/13 09:23 AM 02/05/13 09:23 AM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	Without looking off the top of my head, I say it's for the vacuum to operate the heater/AC box. a rubber gromment goes in there.

Re: 72 roadrunner firewall hole [Re: 70_roadrunner] #1381888 02/05/13 11:02 AM 02/05/13 11:02 AM
Joined: Oct 2008 Posts: 765 Shoreline, Washington 72roadrunnergtx super stock
72roadrunnergtx super stock Joined: Oct 2008 Posts: 765 Shoreline, Washington	Correct, pass through for the heater A/C control vacuum supply line. Grommet is molded to the original vacuum hose. 1972 Road Runner GTX 440 6bbl 5-speed [img]http://72rrgtx.com/carpics/bucket/DSC06730r-1.jpg[/img]

Re: 72 roadrunner firewall hole [Re: 72roadrunnergtx] #1381889 02/05/13 11:08 AM 02/05/13 11:08 AM
Joined: Jan 2008 Posts: 39 AR 7 70_roadrunner OP member
70_roadrunner OP member 7 Joined: Jan 2008 Posts: 39 AR	Thanks!

Re: 72 roadrunner firewall hole [Re: 72roadrunnergtx] #1381890 02/05/13 11:13 AM 02/05/13 11:13 AM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	I stuck a steel tube through mine and the rubber vacuum hoses slides on to it, can't tell that there's a small steel tube in the grommet. I didn't even try to get rubber vacuum hose through that rubber gromment.

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