SBC Cam Button

[billscamaros]

So, what exactly does a cam button do? I assume that it positions the camshaft in the correct position and ensures that the cam does not move fore or aft. Is that right?

The SBC 350 in my Camaro doesn't have a cam button in place. Are there different size (thickness) buttons, depending on the timing cover used? Do you always use a cam button?

Thanks

Bill