I made the headers . Started with a set of unwelded "Scrub" headers . added about 3/4" to each of the center of outside tubes and added a small turn at bottom of each tube before collector to clear frame . would have liked to make them longer but too much stuff in way.. Object was to be able to put hood and sides on .. Took more time than you would think but I enjoy such projects.. engine sets low enough to install a 4-71 under hood in future ..I bought one of the "Y-Bloke " intakes..... That will be a challenge with clearance issues also...Until them Ill enjoy driving the car a lot.. Regards Steve McD