I am installing crower stage one cams in my Focus and I've run into a bit of a problem. All of my valve clearance reads are to low. All readings were in spec with the factory cams. Six of the eight intake valves have 0 clearance. I don't think Ford makes small enough tappets to bring the clearance into spec.. These cams should be a simple drop in since crower says they have a factory 1.425" base circle. Has anyone run into this problem?