I found a nice wire loom for protecting wiring harnesses that's coated with a very bright metal coating that looks like chrome.
I used the 1/4" ID wire loom for my Triumph Light Bar harness for protection and looks. Take a look at the picture:
Light Bar cabling with wire loom I found that loom and others at:
cableorganizer dot com The next size up might be useful for protecting the three wires on the right side of the motor (nuetral indicator, timing, & alternator output).
Jay