I'm 100% convinced the noise is either at the cam bearings or lobe/lifter, but really didn't know how determain which is the culprit. Anyhow,cam is in USPS hands now for polishing/coating. Bearing/journal clearance is a question mark for sure. Since I'm building this myself, it may be time to buy a dial bore gauge, cam bearing installation tool and some bearings....It's only money right ?