My 6.1 retrofit thread
OK - here's the headers I'll be using -
They are from Street and Performance - appx $600
Chromex coated inside and out - 1 3/4 primaries into a 2.5" collector (would be nicer if it was 3")
Fitting
A trial fit with a Dart running our right side frame mounted steering box showed no interference - but there's no way these will work with a rack.
Not sure about your US steering box but I assume they would have designed them to at least work with the factory set up.
Service was A+.