A good start?

As stated, 318 oil pan/pick up tube will not work. I HIGHLY recommend either buying a balanced flex plate or have your machine shop balance the one off the 318. I had this done for 45 bucks. The truck converter will most likely be to tight of a stall, and you'll not like it. Your converter in your dart will work fine if you balance the flexplate. If the water pump is different, the 318 water pump will bolt right on the 360.