We have used hundereds of Indy pushrod kits(we cut and build for each application)Hemi,Wedge and small block.The only issues we have seen is the occasional loss of a pushrod for varying reasons,ie: adjustment,geometry,bad rocker or adjuster,and cam and lifter issues.We had a bad set of 5/16 SB pushrods that the lifter ends flattened in the press,but that was over 8 years ago and Indy replaced them,nothing since.We also use Manton and Smith with no problems either.