on my 73 cuda, the whole exhaust system is supported by two hangers on each side, on the left, a hanger behind the rear seat and a bracket coming off the side of the chassis rail just in front of the shackles. on the right, a hanger on the shocky cross member and again like the left, a bracket from the chassis rail just forward of the spring shackle. So, both sides had no more or less support, just a slightly different location,,,,, not sure of the reason for this though.