I don't know what the cam in block engines are using today, I haven't had to do one in a long time, only belts and OHC with chains that don't use plastic on the teeth.
Turning the clock back I saw hundreds over the years, the first one was a 69 riviera 430 in trade school, it must have been 1972 or so. Plastic bits all over the friggin place, the replacement was steel only, I want to say it was a Cloyes.