Threaded hole to right of wiper motor?

[1967RS/SS]

Wondering what this threaded hole is just to the right of the windshield wiper motor (toward bottom) on my 67 350 01C?  It seems to be about 1/4" in diameter.  Thanks

[Sauron327]

It's for that braided ground strap hanging behind the rocker. See the hex head screw in this photo? http://www.camaros.org/images/pages/options/firewall_speedo.jpg

[68camaroz28]

It's a Zinc screw and you can find info in your 67 AIM under the U63 (radio) section.  Screw is a 9420152, a self tapping, 1/4-20 x 1/2", with indented head. Can be purchased @Corvette Central #192117 (same head marking as what our 68 had) and Paragon offers "RBW" screws #11189K, 7 screws for $5.00  67/68 Corvettes used these scews for radio ground straps and brake line clips.

[1967RS/SS]

Got it! Thanks guys...