You don't want to use copper Dave, it will eventually fatigue
from vibration. If it's mounted ridged on the engine you could
use Steel lines, but originally it would have flexible
hydraulic hoses. You've been around the 'bolt long enough that
I'm sure you've seen the many discussions and illustrations on
how they were plumbed in to the Stovebolt sixes.
The later is definitely the way I would go.

DG


Denny G
Sandwich, IL