[oldman]

to make a larger fuel lobe the base circle is cut down, to make up for the room comp cams has a .080 lash cap and the .060 GM LS7 intake valve lash cap works. Might have reversed the size forget now. Anyway it has to be measured and ground to fit, I've always used the thinner one, the thick one needs to be cut (don't know why they make it). I have a completely standard thinner one in my engine now with a cam motion fuel lobe. My first cam was a Texas Speed lobe and I think I had to go to .022 for clearance.

There are guys that have zero lashed their stock stuff to get just a little more throw. Probably works as there is a reasonable amount of production slop to take up which equals to a slightly longer stroke say .010 or .005 or so..

The cam has a phaser that advances and retards the cam with oil pressure, my first cam required a 22 degree phaser, my second cam needed a compete lock but with valve reliefs and my smaller lift I could do a 5 degree limiter. The after market cams have more duration and lift and without the limiter / lock the valves will kiss the pistons and it is like kissing your sister..