Ok, yes, I have...however it is typically not done on street engines other than to verify cam timing. Typically, for each 3-5 degrees of advancement or retard that changes the power band by 300-500 rpm...advancing lowers the power band, retarding increases it...there is NO hp/tq increase. If you are going to do this, physically checking piston/valve clearance is required. I will state this, that anyone (street engine wise) can easily avoid all of this by speaking directly with the cam grinder and let them do their job by addressing your performance desires, fuel, altitude, driving conditions, etc. as compared to buying an "As seen on TV" cam off the shelf from a company that has a great PR
program...….. if the cam grinder has done their job, the install should be "straight up", simple and straightforward.