Lifter options

I have an older Comp Cams 1.5 ratio roller rocker on my XE285HL in my 340. No issues on break in.

My Summit cam just had a lifter issue. It is not the lifter bore as the engine block used was checked and tested by myself for an easy spinning lifter in the bore before assembly. This is the blocks 3rd cam. The 4th has broken in well. It is a Comp Thumper cam. 231@050, in a 10.5-1 - 360, Edelbrock head and chink knock off intake w/headers.