If you have balls on your clutch hub for bearings, get rid of them and install rollers instead. Use plenty of grease.
Check to make sure your steel plates are flat, not scored, rusted, etc. Replace the bad ones. Check the ball ends on the plates.
Check to see if your clutch material/fibers are not grease soaked or otherwise sticky from burnt up clutch material on them.
Check the same fibers to see if the rivets are worn away or loose.
Check your throw out bearing and use the large one, not the late tin cup type junk with needle bearings.
Check to make sure thre is nothing obstructing your clutch arm from returning to the fully out position, or a bad cable, bellcrank, or spring in your mousetrap.
Check to make sure your clutch rods are properly adjusted, both the one inside the trans that runs through the mainshaft AND the one from the eliminator to the clutch arm above your lid.
Check to see if your throw out bearing is adjusted properly. Sometimes the back of the threaded adjuster wears badly against the clutch rod causes problems.
Your clutch plate springs might be adjusted too tight or you have the wrong springs in there.
Finally, why go to an eliminator or the rest of the aftermarket junk? Get a foot clutch and jockey shifter.
New Knuckleheads? Thank, you, Jesus!!