My take on the oiling system crossover tube for the small block

rumblefish360 said

Isn’t it the reason the left oil bank is blocked so oil does t go up that direction to feed the lifter valley by stays at the crank/rods?

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That's my feeling, although I'm far from a expert on the subject. But essentially, you have 8 oil leaks on that side, taking quite a bit of volume of oil from the front journal