I had something strange happen to my 427 when I first put it in the Corvette. It was a Speedomotive crate short block. It always had normal oil pressure, but after a few hundred miles, a wrist pin seized and ripped apart the forged connecting rod, which shot pieces out the oil pan.
Upon open-heart surgery, my machinist discovered that a piece of wood had been shoved and wedged up in the oil galley, AFTER the oil pressure sensor, so that while my oil pressure always looked normal, I was starving my bearings until the engine finally broke. And it broke quite suddenly.
Yes, Speedomotive bought me everything I need to rebuild my engine again, once I mailed them a letter threatening to sue them. They theorized that they had a disgruntled worker in their place that sabatoged some of their crate motors.
I'm not saying that's what's going on here, but I have seen strange things like that happen. And it had us scratching our heads until we got to the cause.
