360 converter to a 318

Your positive the 904 was behind the 360 in your 67 Dart? I ask because the 360 wasn't used until the 70's and the input shaft spline is different on a 67 904 to a newer one. If your sure the converter is right for the trans. the answer is yes you can just knock off the weight and use it behind a 318.

BTW: you said weights as in more than one? There in only one weight used to counterbalance a 360. It's on the front (engine) side of the converter. There are other thin weights on the outer diameter of the converter but those need to be left on cause they balance the converter to neutral balance.