On my '67 Coupe, I replaced the bushings with Brass. The pins have flat spots on them, I ground them off with a Dremel to get them out. Then I put a sot weld in the same spot when I got them back together and flat spotted the sides so it looked "crimped" as original. I also replaced a Detent Roller. Rather than use the Shoulder bolt they sent, we built up the original pin by welding it then grinding it down to proper size. Then we polished it smooth, put the Roller on and welded a small flat washer on top. And "voila" looks almost exactly as original.
Bushings are bronze. Brass is too soft and would not last. The rebuilder also replaced the detent pivot point pin. The detent roller is hardened and it is also fitted with a bronze bushing to ride on the new pressed in pin. Better than a roller without a bronze bushing. Hinges were also beadblasted. Pin replacement procedure is optional. Standard procedure is the new pin has a c-clip groove lathe cut tight to the hinge so it can only be seen if one looks underneath. Then the pin end is chamfered prior to being cut to correct length. Pins can also be staked instead if desired. Clips are nice if not being judged for originality because the hinges can be taken down for better painting. For the cost of that attention to detail, precision and quality, it's not worth it for me to interrupt shop production time for '67 lower hinges.