Unknown Cam

It's usually easier for the DIYer to measure with a dial indicator at the retainer. In order to get an accurate reading at the lobe, you need an adapter that fits into the lifter bore and holds the dial indicator directly on the lobe. Not everyone has one. Hell, I don't even have one. Once you get the lift at the retainer, you can divide by whatever the rocker ratio is to get the approximate lobe lift. So if you come up with a lobe lift of say, .495 and your rocker ratio is 1.5 then .495 divided by 1.5 is .330 lobe lift.