those were created to be able to change cams w/o pulling the lifters out. very outdated really. why cant u just deburr the part that is making them stick?
Yes, like I say... these my work perfectly fine when in the engine without any mods...
It´s well over two fot per set to work over, plus assembling the springs off and on, and I only do that if someone have experienced trouble with this early typ lifters