JPG wroteSome????
All of those eccentrics that do not have the 'split' feature. But the spit eccentric, IIUC, has been around much longer than the 'new' (non- water pump bearing) Idler shaft bearings.
The 'old' SS web site had a very clear explanation of this with pictures. I can't find that now on the new web site. In essence the split eccentric will work on any Idler but the new Idler bearings require it. All PowerPros require a split eccentric because all PowerPro Idlers lack the sealed water pump bearing.
If the OP has an eccentric with the split, my advice would be to ask SS to ship your kit short this part unless the have a
good ship date.
- David