Slant 6 to 318 conversion engine brackets

Hello everyone. I am looking for a kit to put a V8 in my 73 Dart. It has a Slant 6. I know kits are available but seem to be sold out or on backorder for the 73-74 models. Does anyone have this kit they aren't using or know if the conversion kit for the 67-72 A-body will work? Thanks for the help!