Oil modifications.....why and how to.

Make sure the cam bearing oil holes are lined up. You will have to elongate the holes, guranteed. It is OK to restrict the oil some, but NOT at the bearings! Don't matter what bearing, they need as much oil flow as you can get them.

Most cam bearings are at least a half moon off.

What I do, is beat the old bearings out on disassembly, pound them back in with the hole to the lifter galley perfectly lined up, then drill from the top of the main cap into the bearing. Then I take them, and copycat them with the new bearings.

The reason I mentioned this, is because it seems most forget it.