Does Energy Suspension show the same part number for the bushing?
I know that there are some differences in size within the same manufacturer's product line. I replaced my bushing this weekend with one made of Delrin and it was made for a RE1660 and mine, a RE1600, used a smaller bolt, consequently a smaller hole. Both have the same outer diameter as the stock bushing in a stock trackbar.
Honestly, the best option is to go down to your 4x4 shop and look at them side by side.