I'm trying to beef up my 318 and looking to start with headers unless anyone has a better idea. I'm not looking to build a race car but would certainly like more power than the stock 318 in my Coronet and am looking for some suggestions. I checked Jegs and they make an exhaust kit for a B Body that runs at 2.5 inches at the outflow and it's leveraging hooker headers. I also see that hooker makes another model with a 3 inch outflow, which do you think best fits what I'm trying to accomplish? Once that is completed, what suggestions do you have for increasing the power while keeping it out of a shop for extended periods of time?