Definitely have a new crank checked! I built a 496 BBC for my dragster a few years back. I did not check my NEW Eagle Crank. After eight 1/8th mile passes, I noticed my oil pressure fuctuating a lot. I drained the oil to find a lot of bearing flakes. I pulled the engine and tore it down. Then I took the short block to the machine shop. They found the New Eagle crank to be out .003 on the mains.
I was real lucky to find my problem when I did. I had the crank turned .010 under. And with some new bearings and gaskets I was back at the track.
The Machine shop I use, then told me they see this a lot. With Eagle as well as most all the manufactures.
Eagle did reimburse me for the machine work I had to have done. And I never had any other problems. This was the second Eagle rotating assembly I have bought. The first was a small block, that I didn't have checked. I never had a single problem with it. Both engines were used strickly for drag racing, both 1/8th and 1/4 mile.