340 Lifter Clacking.... Reasonable Price?

The magnet thing will work good as long as yu dont have a "lip" on the lifter.. And if you do just keep working it.. Ive done it one mopars and even 2.8 and 3.1 gm's they said it could be done..If clacking that bad it may ahave come apparrt..Did you try changing the rocker? pushrod bend? roll it in a flat surface and see..