440 fuel pump questions

[blown motor]

Need to replace the fuel pump on a 440. Wondering about the rod. How do I know if it's worn too much? Any tricks for installing the new one? There's a pipe plug under the fuel pump opening. Is that to give access to the rod?

[Brads70]

https://www.manciniracing.com/marabrtipfup.html

According to this they are 3.220" long. Some grease on a cold engine helps keep it in place long enough to get the pump arm in.

[blown motor]

Thanks @Brads70 I don't understand what the grease does. How does rubbing grease on the rod hold anything?
My rod is now jammed. I think I have to remove the plug to get it out. Do I grease it and shove it back in the same hole?

[blown motor]

Also, does the top bolt for the alternator go into a water jacket? I want to remove the alternator to make it easier to work on.

[Brads70]

Thanks @Brads70 I don't understand what the grease does. How does rubbing grease on the rod hold anything?
My rod is now jammed. I think I have to remove the plug to get it out. Do I grease it and shove it back in the same hole?

I'm really resisting a comment here...    
Holds it up in the bore longer than just oil. I'd pull it out and measure it first.

[jimynick]

AND, make sure the rod isn't burred over preventing it's easy removal. Nice of uncle Brad to supply the correct length, too.