Chris Haynes wrote:
If they truly are installed upside down your only option is to remove the rivits , reinstall it correctly and replace the rivits. The 50049-36 is for rigid Knucks abd Pans only. The 50049-58 are for swing arm frames and will cause a rigid frame machine to stand up too straight. The 50049-58 is easily spotted by two holes drilled in the outside of it.
They're both the same, except for those inside pieces being reversed. Which two holes drilled in the outside are you talking about on the 50049-58? Both of the mine have the four mounting holes in them, that's it.