273 to 318

When you say later...pre magmun or magnum??? Either will bolt up to the trans... Not 100% sure with the balance of the magmun??? Pre-magnum just swap out the water pump, I'd replace with new one... Use all the accessory brackets and pulleys. I just switched to the later style water pump and radiator, passenger side exit. Also the timing tab from the 273 should be swapped.Oil pan, as long as it is a center sump you are okay... rear sump should work too...

Bob
64 Dart 270 2dr post
360/904