4 speed linkage hardware help

No, doesn't sound like it. The 3 speed actually says Mystery shifter on it. Being in my late teens and early 20's back then, the joke was that it was a mystery as to what gear you were in. Meaning that they were not as good as the Competition Plus shifter. They shift just fine. They will break syc brass rings if you really beat on them racing, they have no stop like the Plus. I broke a lotta brass before I got wise.