very interesting points of pros and cons.....I still feel the best course of action to stiffen any chassis is a good 10-12 point cage. Attaching the body to the cage is several spots will also help a bunch. Stitch welding is EXTREMELY labor intensive, and doenst add that much strength to the car overall. I know someone that can intstall a awesome cage for about the same time and money it would be to stitch weld your car.