489 Crush sleeve or Eliminator

Inertia said
You may be thinking GM RRR,
They were 210 ish IIRC.

Maybe, I don't know. I DO remember getting on a 3/4 drive ratchet with a 5 foot long pipe to do one one time. We got it done, but it took three of us. Two on the ratchet and one holding the brake HARD because the parking brake would not hold it.