Oil pans for slant 6 motors

There are several different pans for the slant.The most common are the car pans. The early A pans are different than the later 67 to72 pans.Then they changed again in 73/74.I installed a 67 engine in a 64 Dart and had to change the pan because the 67 pan hit the K frame.That's all I know. Lets hope that someone with more info can help .