Drill mark on crank journal? Roller 360

Scored an 89 360 long block for $100 a few weeks ago, owner had it listed as a magnum 360 with LA heads, I went to check it out, turned out to be a 360 roller cam la with nice 308 heads on it. It is in good shape as well. I am planning on regasketing it and assembling it with parts I have to try in my Chrysler. I pulled the rear IMG_20160622_213200.jpg IMG_20160622_213246.jpg IMG_20160622_213317.jpg IMG_20160528_215455.jpg main cap to replace the rear oil seal, and noticed this on the crank journal. Anyone seen this before?