cam cam with two pins..which one to use?
 

My Comp cam came with two dowl pins but I don't know which one to use.
One is a little longer than the other. How do I know which one I need and is there any special procedure to install them?
There was nothing in the instructions about it.

The longer one is for carburetted engines. They had a mechanical fuel pump that was driven off the cam.

Take care,
~Chris