I am in the process of pulling out the slant six and dropping a 340 in my 67 dart. I bought a 68 Barracuda front end with the 10" brakes, k frame , control arms, spindels, and torsion bar. I have heard two differient stories some say you must change the torsion bars to handle the weight of the eight cylinder. some say leave in the stock slant six and it will lower the front end. but they appear to be smaller in diam. What versions have you all ran across or heard Thank YOU