[Half-Inch Stud]

Dave, My Harland Sharp Roller rockers are unfairly sloppy aroung the wristpins. Have not had any reliability issues, do not forsee any reliability problems, and thewy inspect well - for reliability.

Performance, mine are sloppy, thus not getting the full benefit of the cam, nor the consistency, for every crank turn. I'd have to give a darn to replace them.

My other motor has the Crane Roller Rockers..the ones that grind into the Valve Retainer..these were 'worn-in' by someone else; Got'em Used [another fine purchase].

My advice is to Dry-Fit the Roller Rocker to your Engine assy before commiting to buying. Kind of a catch-22 if it's an odd-head or valvelength or cam basecircle combo.