Building a mild 440

...... unless all the oil company’s are all leaving a component out??[/QUOTE]
OIL.
I prefer to run a high zinc oil, I have many flat tappet engines in my yard, I run either a diesel oil (15/40 Rotella) plus half a bottle of Lucas zinc additive, or VR-1 Valvoline oil (high zinc) if I can get it.

I don't want to start an oil debate, there are plenty of those, just saying what works for me.

don't be scared of a solid flat tappet cam