it looks like one side of that lifter is hitting the cam lobe before the other side, it looks like it is loosing contact with the lobe after max lift work shruggy
I would replace (or have them rebuilt with new wheels, axles and bearings) all the lifters off of the lobes that look like that twocents

Last edited by Cab_Burge; 12/13/19 02:32 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)