Are you using the original equipment type remote filter, or an adapter intended for a modern disposable spin-on filter? The original bypass filters used flex lines to and from the filter housing. If it's a modern spin on filter, you need a 1/16" diameter restrictor bushing somewhere in the plumbing to avoid starving the engine for oil. If you choose hard lines, it might be a wiser choice to use steel lines rather than copper, similar to fuel line or brake line tubing.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!