Boy, I wish you luck with that. The back row at the storage yard at the marina I kept my boat at thirty years ago was filled with boats like that, some with a few boards replaced.
I admire your ambition.
Should look good in the boat... Painted cream with new decals, brass fittings and copper lines. I can mount it on the hull bulkhead as long as it has the correct fall for the oil to return to the sump. I assume it is just gravity return?
Don't even think about using copper lines. And a bulkhead mount will also require flex lines. An external oil line failure is the quickest way to convert your fresh engine into a shiny new anchor.
Cooper lines run properly, correctly aneeled to make them soft ( ie not work hardened) without tension on them and with the needed anti vibration coils put in the lines are fine. It was done all the time on early vehicles.
But I take your point. Not done correctly they could be a disaster.
As you profess to know everything there is to know about copper tubing, I'll not remind you of the several factors you haven't considered. And I'll challenge you to identify the early vehicles you believe to have used copper tubing all the time.![]()