We moved the stock steering box forward on Ranchero gasser a friend built. Everything cleared then...
I thought about that today too. #8 port is right inline with the box. Just a few inches forward would free up a lot of space. What year Ranchero, what headers?
Would you consider a rack and pinion option as a means of solving the steering box issue. http://www.totalcontrolproducts.com/rack.html
Do you own a torch ? Then gas weld your headers. Do you own a mig ? then mig weld your headers. You are not building a model car or a lego set. My first set of headers I built in 1965 were torch welded. I can't tell you how many since then. These headers for a small block Ford were mig welded together. My old Falcon had Doug's chassis headers, but the motor was set back about 8 inches.