hard or soft copper line for a valley oil gallery bypass line?

You know, I explained it as best I can. He wasn't satisfied or he doesn't agree and I'm fine with that. But to keep going over and over and over and over and over the same ground is a waste of time and bandwidth.

If you don't agree just say what you want and move on.

BTW, I can tell you've I've seen the results from the "you can't over oil an engine crowd" and the answer is yes, you can. The oil has to be in specific places at specific times. Bringing in oil from two directions isn't an answer IN MY OPINION because i have seen the results.
Why do you think Chrysler designed front oiling bosses right into the casting of the “X”
and “R” blocks if they thought it was not beneficial. The guy made you a simple drawing which is representative of the small block and asked you to explain why you are saying two columns of oil won’t flow. And you answer him with an insult. We had this discussion over 2-3 years ago and Rapid Robert was part of that discussion back then.
He had decided for his own reasons to perform that modification.
That Sanborn guy was a real racer who raced all three brands of small blocks and he said he could not get the Mopar to live until he performed those mods. That’s good enough proof for me and many others.
If it’s not for you, then yes we agree to disagree. But you came back on the forum with a new name and decided to have the whole conversation again. Bob Glidden used the crossover and oiling mods. That’s proof enough for me. The guy who developed the
Famed w2 head designed that oiling mod, that’s good enough for me.