68 dart 360/904 vibration

ive never line bored anything and i havent balanced anything either, with the trans broke off the engine still runs and vibrates but not as violent. i dont even know if it had the vibration before i owned it as i bought it a non runner,im guessing it did have the vibration. can anyone tell me what flex plate /torque converter combination i should be using with the 360 /904 trans thanks