Really wasn't a problem to time. I returned your pm concerning this.
The Dart originally had a 273 but it should have had the same setup as your 318. But the engine had been replaced about 15 years ago with an '80s 318. They used the original (273) water pump but didn't change the timing cover. I had to redo alot of the backyard engineering they did at the time of the swap. If I would have had the original (273) timing cover I would have used it on the 360.
Dallas