I recently bought a 78 CJ& with a 258. I got it from a guy that was tired of working on it and the thing sitting in his garage. I new it did not run quite right when I got it. After further inspection I realized that there was a gm throttle body on it. There is also air blowing out of what looks like a brass bolt/sensor on the back right side of the engine. It is making a whistling sound. It may be some kind of temp sensor...not sure. I also took the valve cover off and saw that the springs that are under the rocker arms are hitting on the valve cover (I have pictures). The weird thing is that it is the right valve cover. This was causing the valves to not be able to close. Basically I have no clue what to do. Any help is appreciated. Thanks.