passage

I believe there is a oil passage mod or extra hole that is drilled in the main bearing area of the casing, does anyone have pictures of this?

While removing the heads from my '85 max motor, I ended up breaking the crossover joint/sleeve whatever it's called. The little tabs that you're supposed to pull on to remove it broke off very easily. Actually kinda crumbled. It looks like new ones are about $15/ea from the stealership...