[Cashburn]

We buy our cables and gears from Mustangs Unlimited. They have a helpful table in their catalog that explains what gear (color) to use depending on your rear ratio etc. I usually just order the longest speedo cable they stock so it can be installed with a graceful bend.

Best thing is to ditch the Autometers though, the gauges are all prone to fail. We've been through the ringer on their speedos especially.