I ran the GSCA Lunati 210-205 for several years, Ran mid 10's at 130 mph with it. I absolutely loved that cam. Quiet operation and good idle. If I didn't go roller ( which by the way is much noisier ), I'd still have that flat tappet in my car. Some blocks are noisier than others ( most likely lifter bore differences ). As far as asking how it lasted----there are too many valve train, and break in differences, so don't worry about other guys horror stories about ANY cam. I wouldn't worry in the least about buying a GSCA cam. Brian