#1 Cylinder seems dead.

I had two separate 318s do something similar and on both of them I found a pushrod that had punched thru the rocker If I remember correctly one was an intake valve the other was an exhaust. On the first one It was weird I didn't hear a thing i just noticed that i had lost some power I thought it was carb related I had alot of carb issues with that truck so I pulled it off and cleaned it and rebuilt it and nothing changed. So I popped off the valve covers and there she was lol I replaced the rocker and the pushrod because it had bent and drove it another 5 or 6 years lol the 2nd one was about 10 years after that I bought another truck just like the first one I just mentioned for parts but it was in such good shape I drove it. It was a 2wd I drove it for a year before I parted it and when I pulled the engine sure enough it had the same thing I never noticed it. Lol