JCKN, Are you talking about a V8 application in an AD truck?
I am not aware of any long tube headers that are a direct fit. Not even short tube headers will fit unless you do something with that OEM steering box. What I did to solve my header problem was to get a set of shorty headers and turn them upside down, and then loop the exhaust back down into the rear corners using mandrel bends. My son hates it and wants me to change it, and someday, I will. But as long as you carefully wrap the pipes, there are no real heat issues.
What I would like to do is make a set of custom headers for my truck, and when I do, they will be Tri-Y style, since torque is what you want to maximize on a truck.
