Thanks for the input radar. Sounds like the 3 inch system was simply too big for the 302. I would imagine that a mild 250 would flow no better than your 302. Probably not as much. I bet the engine sounds good. If I do go with a dual system I will go 2 inch all the way back. It seems like from the posts here a person doesn't lose much by going with a single 2.5 inch system. Keep in mind that I will have manifolds not headers. I really like the way people on this site force me to think and are so helpful. Jay6155