This matching set of Horns, Hi (492) and the Lo (491), Date code (6J2,5J4) have been tested, inspected, and sound nice. GM Horns from 1963 thru 1972 are the same, but there is a few different brackets. Look at the pics and see if these will work for your application.
The item "69 Original GM Delco Remy Hi Lo Horns (491) (492) 1969 1968 Chevy OEM 68 69 70" is in sale since Sunday, February 28, 2021. This item is in the category "eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Other Parts".
The seller is "fishwallman" and is located in Minot, North Dakota. This item can be shipped to United States, Mexico, Germany, Japan.