On Thursday, September 6, 2018 at 9:32:19 PM UTC-4, dpb wrote:
On 9/6/2018 4:09 PM, Clare Snyder wrote:
...

How heavy are the wires? How many conductors in this sheath? How big
is the sheath? I have several ideas depending on your answers

The particular missing run is just one 10 ga power feed to the choke
solenoid...there are others from 1 14-16 ga conductor to a 30-conductor
cable but I don't have to deal with one of those!

--

You sure you're not over engineering it? Wire insulation for auto use is tough, I've never seen it affected by oil, if gas is getting on it, a bit of that won't harm it either, if it's more than that you have other problems. I'd only be concerned about physical abrasion, ie if it's exposed, subject to movement, etc. And hopefully it's fused.