I have experienced bent pushrods and just a week ago a broken pushrod.
This is like the pushrod looked when I took the valve cover off:
I run Dove aluminum rockers, and I have had to grind the area around the screw with the ball which takes the cup of the pushrod because the cup was touching the rocker and did probably hang inside and was pushed out of its location during one valve float event during my last racing.
Here you see a ground rocker:
Another area to check is the holes for the pushrods. Sometimes the pushrod touches or rubs inside the hole in the manifold; If you adjust the valve lash with a slightly bent pushrod it will force the cup sideways on the ball and eventually the cup will break. It happend to me once. I had to grind some holes in the manifold to make space for the pushrods. here an example:
Hope this helps
eljaro