Measuring a cam lobe????

Here's how. Measure the base circle. That's STRAIGHT across the SIDES of the lobe. Write that number down. That's the base circle number. Now measure the WHOLE lobe from the BOTTOM of the base circle to the PEAK of the lobe. Write that number down. Now, divide that first number you got from the sides of the lobe in half. Next, subtract THAT number from the whole lobe measurement. That's the lobe lift. Now, finally multiply THAT number by "whatever" rocker ratio. 1.5 is "usually" it for small and big blocks unless you're running 1.6. Does that make sense?