I did a tubular a arm and disc conversion on my 67, you may be up against your stops on the lower control arms or just above them. Depending on if or what kind of headers you are going use you may run the risk of dragging them.. I had to crank my torsion bars up some to give me some clearance.
My car won't be sitting higher in the front end will it? My goal is flat or a tad lower in the front. Or will I need to get drop spindles in the front?