suggestions are appreciated

What people don't realize is wire is only the path from one fire to another. Fires are caused by wear and moisture in components where the wires terminate.
Manually operated switches, wiper and blower motors, ALT' gauges, etc.. are common causes of fires. New and larger wire is kind of like changing the paper matches to butane lighters at these places.
Now another revelation... Us older guys have walked a lot of junk yards in our day.
We can recall so many wrecks that were only that, bent bad. In fact the few burned vehicles I recall were only burned, never bent.
We go to todays junk yard and see so many that are not only bent but burned bad too.
Why ? Simple, all the freakin electrical crap in the mix.
Bottom line, too much electrical, improperly routed wires, blended with remaining 40+ yr old components can do more harm that good.
I choose to renew original harnesses with minimal upgrades needed, rerouted in the same positions, and added circuit protection too.
Since even those factory engineers cannot prevent electrical fires in collisions, the very best thing we can buy is insurance.