I am in the process of picking a replacement header for my 67 Chevelle. Car is a 396 and I currently have 2" primary x 3.5" collector Hooker Comeptetions. I want to drop back to 1.75" primaries and a 3" collector to build more bottom end torque.. I am down to 2 choices. Flowtechs or Hedman's. Called Jet Hot and they recommend the Flowtech as they seem to think they are a better fit than the Hedmans. Anyone have any real world experiences with these two headers?
personally i wouldn't change from the headers you have unless they're just shot or something. you won't see a dramatic difference in bottomend anyway because you have an 8" convertor. the header swap will likely hurt your performance if anything.
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