Thrust bearing or washer is your choice.
I like the bearing because they might turn easier and might get by with a little less frequent greasing. The thrust washer probably caries more load.
Just my thoughts/opinions.
The bushings have grease grooves, I ream them as smooth as they can be, would not try for a coarse or cross hatched finish. Bronze is soft and any texture I think would be pressed and burnished flat by the hardened pin resulting in slightly increased clearance, so keep it smooth to start with.
Grigg
