I have a roller cam in this 360 and was told with the hydraulic roller cams to break in procedure is a lot easier, my machine shop told me I could run 20-50 Valvoline high zinc racing oil for the first 500 miles and just change it and continue to run that thereafter
He’s right on the money. Break in oil is good for everything on the engine on break in/first start. So since you have the roller cam, you have no need for the high zinc the flat tappers depend on.
