Originally Posted by loup68
William, I just checked my 68 SB coupe and there is a dedicated raised square area, with a hole in it for the speedometer cable and it's grommet, just below where the three small vacuum hoses enter the interior, through their grommet. There is also a "U" shaped hanger to hold the speedometer cable just to the left of it. This hanger is just above the trans tunnel. I hope that this helps you. It should show this in the 68 AIM. Lou.
Ok, I see that spot you are talking about and my original grommet looks to still be in there. It is 90 degrees to the firewall, however, and I ASSUMED it would be parrallel to the the firewall or straight thru it like those vacuum lines are. So the cable comes away from the speedo connection and makes a right angle turn thru the wall. I didn't expect to see that at all. Thanks a ton!