Hi Gregg, I tend to agree with Tenrocca that the single hoops looks best. As he said it really doesnt take up that much room. If your concerned about the space it takes up, Ive seen a car that had the 3rd leg but it only went through the body for about 30mm. From the top it looked normal with its dress ring.
My hoop came from Snakebite in Queensland. The 3rd leg comes through the body with half landing on the floor of the boot and the other half landing on the raised section at the back of the Classic Revival boot. I bent the tube about 200mm from the floor and welded a flat plate which bolts to the floor
Regards.