Does ur builder know that the rocker shafts have to be put on a certain way? Pass side notch to the left and down. Driver side notch to the left and down also. That won’t make ur lifter preload any different, but will screw up the oiling if not right. Kim
Unless you get a pair of shafts (from Comp Cams) that are incorrectly marked. I was looking at the oil holes vs the "notch" markings and luckily noticed that the oil holes were 180° off.
