Lifter galley paint

The race head issue, like my W7 heads, is exacerbated by the different shape of the heads. You pretty much need external lines, unlike a stock head. If you need paint to get the oil to return, you have bigger problems than paint is gonna fix.

The external lines are actually a blessing in disguise. They allow you to return oil directly to the pan without going down the lifter valley. But regardless, they are not so much of a 'trick' as a requirement.