i have had many gn's and ttypes. i currently need an oil cap for the valve cover on my gn. i have had the stock cap with filler neck in the past along with the K&N style, but I prefer just a cap that fits on valve cover and good so it wont leak. I have gotten many from wrecking yards and none of them fit the valve cover quite right. i dont want to waste my money at a parts store unless i am sure that it is going to fit right. What caps are you all using on the stock valve cover? anyone know a place where i can buy one? part numbers? anything if possible. i am tired of not having a good fitting oil cap that has a good seal ...