73 340 FIREWALL "HOLE".?

Posted By: lawnman77

73 340 FIREWALL "HOLE".? - 12/25/12 03:51 PM

I AM TRYING TO FIND OUT WHAT GOES IN THE 1/4-1/2" HOLE DIRECTLY TO THE LEFT OF THE OSAC VALVE LOCATED ON THE FIREWALL, NEAR THE PASSENGER SIDE OF THE ENGINE BAY. WE'RE SURE IT IS SOMETHING TO DO WITH VACUUM, BUT NOT SURE JUST HOW SINCE WE DO NOT HAVE THE PART THAT GOES THERE...
ANY HELP WOULD BE GREAT!

Posted By: rave_12000

Re: 73 340 FIREWALL "HOLE".? - 12/26/12 05:19 AM

need a pic

Posted By: burdar

Re: 73 340 FIREWALL "HOLE".? - 12/26/12 06:07 PM

318 cars used an extra vacuum valve there. 340 cars just had a metal block off plate. Your car must be an earlier built car. Later on in 73, the factory stopped punching that hole in the firewall.

Posted By: burdar

Re: 73 340 FIREWALL "HOLE".? - 12/26/12 06:15 PM

73 318 with extra vacuum valve...built in Oct 72

Feb built 73 340 car. No hole punched in firewall.

73 340 built in Oct 72. Metal block off plate over hole in firewall.