My original IEL bar for my JC. Slot is 4.5" from the tail to the front. The bridge is about 1". Width is 1/2". Oil hole is there on the left full of crud. It uses a bar adjuster in the bar slot like the 600s and 700s.
Few more shots. I now only lack an 800. Had one years ago but I traded it off. No regrets as it had serious issues--all the fuel tank mounts were broke off and it was welded solid to the case.