5.4 engines can be bored up to .060 over. I don't know about sleeves. I have rebuilt a few in my day. The blocks are about as tough as they get. I would say to get a reman from Ford or Napa. I've had good and bad experiences with used motors. If a 5.4 has been run low on oil even once, it really takes its toll on the bearings and chain drive system. Spend the money for a reman with a warranty. I've seen those engines go 450k miles with regular maintenance.