Not sure of the spreader bar.... I have the info at work and will dig it up and send it when I get back from vacation. Now I am on a boat in St.Lucia.
But yes they have turn signals in them and I converted the lights to LED but they did not com ethat way. Easy change over takes less than 5 minutes.
Love the sandersons.....make sure you get the ones for the hi-boy. They make them for a T as well but the tire will rub on the drivers side this is my second set for that reason.
They are stock dimensions but they will also make the to your specs if you like.
Only problem is they get REAL warm so becarful in and out of the car. I have not gotten burnt yet.
Did not know it was on their website....pretty cool