Chris is right,there is a difference between the Saginaw vs. Muncie rod.
Both 1969-70 Chevelles shared the #2889 rod.
They only repop the later 1971 issued Chevelle/Muncie #3931438 lockout rod included in a kit,but I don't see it sold seperately so I think you have to buy all the linkage rods that go along with it for $120.00 through Modern Chevrolet.
Try contacting our sponsor too,D&R Classic,as they sell the Camaro muncie repop lockout rod seperately for $25.00.They might know how to obtain the single #2889 Chevelle/Muncie reverse lockout rod if it's out there.
Here's a seller claiming a Muncie rod set up for sale on kijiji w/pic.
http://toronto.kijiji.ca/c-cars-vehicles...QQAdIdZ56246504