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

Question on the full time cyl. head oiling. After tubing the block and blocking the opposite sides oil gallery. Wouldn't I then need a crossover of sorts from the tubed side to other side?

Question on the full time cyl. head oiling. After tubing the block and blocking the opposite sides oil gallery. Wouldn't I then need a crossover of sorts from the tubed side to other side?
.
If you tubed the right side and blocked the left feed and have decided to block the oil feed from the cam to the heads yes you will need a cross over to feed the left side head.