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

Newbomb Turk said
I talked to him a couple of times before he passed. Really a nice, smart guy. I don't recall reading his stuff or talking to him where he said the crossover tube slowed the oil down. He may have, but I don't remember it.

If you are going to do the crossover to not pull oil off the number 1 main to feed the drivers side lifters I say do it. If you are doing it because it’s going to slow the oil down to make the corner then it doesn't help.
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Sanborn went further than that.He ran a separate line from the oil filter area to the front of the main oil galley feed on “X” blocks. He did indeed vouch for the many oiling problems the small block has when raced. Hydraulics does not totally apply. It is not a sealed system. There are leaks everywhere. This has been well discussed on here.