In the spring of 2021 I installed a new OE style fuel pump on my newly rebuilt 440. 2,000 miles later, it quit running and I found the original fuel pump pushrod was wore almost a 1/4" and was not pumping fuel. I replaced it with another original equipment pushrod I had on hand. Sunday, 2200 miles later, it left me on the side of the road. Not pumping fuel. I find that the pushrod is wore about .200. What's my solution? I didn't really want to go to and electric pump. One thing I did notice is that the pump seems to be very stiff. Is it the cams fault? It is a mild Comp cam.