At the 3 clips, apron, firewall and footboard??? Has anyone seen these on unrestored cars? Do judges look for this?? It's like pulling on a loose thread, you don't know what's going to unravel. Brian
NPD sells the clip at the firewall. The one of the toe-board is the same as the one used on 65-66 fuel/brake lines where they are secured under the driver side floor pan. The clip over by the hood hinge is a shortened version of the driver side floor pan one, but has an extra curve at the end, only has the larger end. The toe board and inner fender clip are made of spring steel.
I still think you're going to disturb any sealant added around the speedo cable if you apply before the cluster goes in. Like I said, it's not that big of a deal to touch up if needed. The original cables I've had, the cable moves in/out of the grommet without much trouble.
Edit: corrected inner fender clip description.