77-78 kenne bell v6 3.8 231

I have a 77-78 kenne bell 231 v6 3.8. Its an even firing engine and Im trying to find a diagram of the even firing order. If anyone could help that would be really nice. (Reason I need it). When I start the engine it runs. But there is alot of spitting and popping comming from the Carb and also...