Switch is labeled as NOS but it shows it has been bolted on. Rear carburetor control is used & tests good. Thermo vacuum switch is used has not been tested. If you have any questions please call Kurt.The item "64 65 66 PONTIAC TRI-POWER VACUUM LINKAGE ACTUATOR CONTROL THREMO SWITCH" is in sale since Friday, July 13, 2018. This item is in the category "eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Air Intake & Fuel Delivery".weaverfamily" and is located in East Earl, Pennsylvania. This item can be shipped worldwide.