[Trueoo7]

Don't know how to link a prior thread, but if you do a search in small block forum under Mechanical fuel pump, you'll see some more opinions concerning this subject. My engine is a 1991 and it does have the two rings.... one inside the other. The outer one moves quite a bit. Unfortunately I verified this just last week when I had to rip down the engine due to bearing problems.... another story. I also verified that the eccentric wasn't loose, its made to be that way.