Oil all over motor ???

What are you running, exactly, for valve covers and breather(SSSSSSSSSSSSSSSSSSSSSssssss)?

Hint: ONE is not enough

Many of these aftermarket valve covers, IE most, are not baffled like the stockers, so that's the first thing against you

You need a good baffled breather, and it SHOULD be hooked to the air filter instead of the open air, because even most clean engines will "puke" some at high RPM. That is WHY the manufacturers all plumbed the breather that way, because it's not always an "intake" even with PCV

And you certainly should be running a PCV