If you find out that you have the wrong frame stand's,the ding's can be fixed.Build some flange & collector block off plate's,then put a valve stem in the collector.Heat the dinged area to a light dall red,then fill the capped header tube with no more than about 60PSI of air pressure at first.The dent should slowly push it's way out.After it's cooled start using scotch brite to work out the discrolored area.I've fixed many car and motorcycle header's this way.Just take your time and work slowly.
