That looks like bad metal to me rant shruggy Maybe when they forged it , it packed all the bad material in one spot confused
I've seen similar problems on other motor parts like a broken ring with a oval bubble in the material were it broke whiney

Last edited by Cab_Burge; 04/21/22 01:41 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)