Thanks to my friends at Speed Tech I don't have to worry about modding my header on a painted car! They were kind enough to mock everything up at their shop and make the needed changes on the #1 primary where I was having steering shaft issues. These are the standard SBC 1-7/8" Stainless Works headers that totally clear a stock steering box...but don't clear a Unisteer rack. But from what Blake tells me, he has been working with SW and they now offer the right header for this combo!
Thanks again Blake, Paul, and crew!