Its basically all stock motor and I think i narrowed it down to the 1bbl carb or my timing mite be just a tad high. Today, I drove it to school and it didn't do it but the exhaust sounds really good. Just when it idles it makes a pop sound sort of like when you have backpressure. So, I think thats what it is now just need to upgrade my carb and i have hedman hedders for it but don't have much time since I redoing my 71 camaro.
