Catastrophic Failure of the Camshaft Bearings

Snake said
Yup I use com cam break in every oil change.What I find odd my 360 build is the only engine I have ever used break in additive ever and i had many 360 318 273 and dare i say it sbc in the past and never put any in what gives.

Snake, in the past 10 years, they pulled all the zinc and phosphorous from the oils nowadays for the catalytic converters