Replace cast iron and leave copper stub downs. Reroute sewer line inside crawlspace to exit out the left side of the home to avoid demo of front porch and follow same path after routing around the deck and tying back into sewer line at the curb. Repiped all cast iron in crawlspace and installed new toilet flange. Tested all work and everything appears to be in working order and there appears to be no leaks at this time.