73 dart header question

Heddman makes headers that will fit, actually fairly well. They also offer 2 different headers one with a 2 1/2" collector for slightly more ground clearance and a regular 3" collector style. Both fit A bodies 67-76. The "tight tube set" shouldn't require any mods to the shift linkage where as the 3" collector set will, just make sure to read all the footnotes regarding both sets before making a choice. http://www.hedman.com/pages/hedmanmain.html