I'm not entirely sure the current set is what is causing the ticking. I was going to do the push rods at the same time but I guess it makes sense to do rods then arms.
I know that they wear down over time. I just don't know how old these ones are. I would assume they are older as they have some surface rust on the shaft.
Is there any way to double check where the ticking is coming from? Seems like the rods and arms is he first logicial place.