440 break in noise from timing cover....we think....be gentle!

Well here's one thing that happened to me. On a fresh big block build, I installed too long of crank pulley to the dampener bolts, and when I fired up the engine, it made a squeal noise
like I never heard before. I thought the worst too. I took off the belt, and pulley, and pulled the dampener and found gouge marked on the front of crank seal stamping on the timing cover
Just my two cents.
Hope you find your noise.
HotRod20