I've read that white lithium grease is the best to use for poly bushes, as it won't react or chemically degrade the bush so you prolong the life the bush. I used general grease on mine as I wasn't aware of this at the time, and it doesn't sqeak - my car is fully poly bushed too! I'm not sure that it actually matters though, as I've read that a lot of people have used usual grease and haven't had issues with squeaking or the life of the bush. As for those plates, I've never seen them come with an ARB, the only place around there that has those plates is the Whiteline Anti-lift kit, they're aro