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

the utube vid that described it said to use a hard copper (I forget the letter designation) but a utube pro plumber said to use soft copper (in his demo) because you would be flaring it. what do you guys think? thank you for your time. RR

My question is why are you running a cross over tube? If you are running it because you have blocked all the oil off to the drivers side lifter bank, than that’s a reason to do it.

If you haven’t blocked off the oil to the drivers side lifter bank there is no reason to bother with it.

Because Chrysler (or Chrysler people) put out bad information on what that tube is for.