my hemi keeps eating its lifters..

What are the chances that your valves are hanging up in the guides.
Is it always the same lifters with the problems.
Perhaps not enough lifter preload, or too much spring pressure for idle oil pressure, or not enough over the nose spring pressure allowing the pushrods to momentarily lose contact with the cups and then slap them on the way down.
You might want to visually check the cam lobes.Maybe theyre damaged.
Good luck