Torque Convertor Swap

No that won't work. Mopar changed the input shaft spline count in 67 from 19 spline to 24 spline. Plus there's the balance problem. To change the output shaft you have to completely disassemble the trans. cause the output shaft comes out the front. That means re-shimming everything up and replacing all seals so considering the age of the trans. you might as well rebuild it. What you can do is use the original 65 trans. and converter and by a B&M 360 flex plate that will do the balancing.