I am looking to do a performance exhuast upgrade on my 95 5.0L. I have installed a K&N and am looking for a little more punch. My question is has anybody installed a PaceSetter TFX™ Performance Kat-Back Exhaust System. Are they any better or worse than a Gibson or Flowmaster. I also was wondering if this upgrade can be done while the truck is on the ground or if you need a lift. Also would any cutting or welding be needed.