If there is 1 or more .008 O/S lifter bores, there is supposed to be a diamond shaped stamp on the i.d. pad. Typically, a standard size lifter in an .008 o/s bore will wipe the cam in pretty short order. I'm not saying yours aren't too big, but a few extra thousandths will pass a lot of oil. You can do quite a bit of damage with a brake cylinder hone pretty quickly.