70 K member in a 66 Dart

As the other guys said Robert, all the PARTS will swap, but not the whole K-Member. Before you spend any time doing the swap, check on the availability and prices for replacement parts for those Willwood disk brakes. I've heard they are VERY expensive but I heven't personally priced any parts for them. I guess I should since that's what's on my 67 Dart GT. Good luck.