[yetibone]

I'd imagine that the tach signal, CHT, and EGT wires would be the most susceptible to induction interference, and the ones to isolate (shield) since the tach signal is a pulse, and CHT and EGT are such a low voltage signal, but you prolly won't have any trouble running them all together in one bundle. If you put the battery in the front, just don't run your gauge wires along the main battery cable.

I'd actually planned to run mine in another loom along the existing harness, unless I see the gauges doing wacky things...then I'll try to shield the offended wires from the ones doing the offending.