We saw no difference between upswept versus the downswept. They downs make it a little easier to work on the car and I do like to looks of the downs better. If you look under the dragster section, check out the add for the Fab Shop BBC headers. They are the nicest looking and best fabricated header I have seen to date....and yes that is why I run them.
http://www.racingjunk.com/category/1...l-Headers.html