Front Sway Bars
mopar crazy according to the parts interchange manual there is no break down for anything other than body styles and years of interchange. 69 cuda ,69-72 dart, valiant; 70-72 duster; 71-72 demon all interchange. the 6cyl k frame will have to be changed to a v8 k frame for the engine swap so find a donar car and grab the whole thing. i personally don't think slant 6 cars had sway bars but i could be wrong.......besides it might be too small for a v8 anyway if it did