Break in oil ?

There's more to it than just throwing in the break-in lube. You must follow a break-in procedure, typically bringing the car immediately up to about 2500 RPM & keeping it there for about 20 minutes. Cam companies will have their specific recommendations. Make sure the car is ready to fire up immediately, i.e. recommend carb is primed. Long cranking without starting has been known to eventually wipe a cam. Change the oil afterward, I would continue using a good ZDDP additive after. I use the Lucas stuff. None of this applies if you have a roller cam which I assume you don't.