I plan on getting a new intake soon and I was wondering what you guys would recommend? I have a mild 406, larger than stock cam, headers, and some worked heads I might put on soon. The 400 is real torquey (sp!) down low (I can afford to lose some torque, 406ci&3.73's), but I want some upper end. So what do you think (dual v. single-brand & type)? Also a friend has an older Holley that he thinks is a 800cfm mechanical sec marine carb. I think 800 might be too big (I have a 600 vac sec now) but just wanted to know what everyone else thought. Thanks for any info.