i already have built my back tail sections and they worked out just fine. but i was loking at finding a fast way to do the front. i remember the metal company having box tubing about the right size. and i cant imagine its much different from the original stuff Chrysler used. and i was going to use some 3/8 or 1/4 inch stuff so its going to be stronger then stock, and also i know to use diamond shaped plates(fitch plates) over the ends of the wield were it attaches to the frame so theirs not a straight line for the wield to break.