went to all ford car show in southeast Iowa sun  with my 55 vic Did Ok got second in class on my way back engine started to run rough/wasn't making any bad noise so I drove it about a 100 miles on home pull valve cover off and #2 cyl intake push rod is gone/this was all rebuild about 11K ago new cam, push rods, rockers  before I got it /My ? is can I just leave the old push rod in there and replace it with a new one or do I need to get the old one out before it cause big trouble By the way this a 56 292