Ok so i have taken my first engine apart bought new (used) cases and as im about ready to start putting back together i look at the old push rod and the one i just ordered and notice like everyone says that the ball has been melted to the end but at the other end my old one has like a flat head on it and my new one doesnt is this normal or do i have something mixed up. The new one is actially a little longer even. Anyway thanks dave