You should indeed use bronze bushings along with the Lippert equalizer kit you mentioned, which is the following part:
- Lippert Tandem Axle Equa-Flex AP Kit - Wet Bolts - 3-1/8" Long Shackles # LC64FR
For a quantity of four bronze bushings with a 9/16" inner diameter that measure 1-3/4" long you can use the Bronze Bushings - Qty. 4 # K71-291-00. view full answer...