1970 DUSTER 440 4spd 8 3/4 posi

I know what you are going through. I have had a lot of problems with converting my car to manual steering. Right now I have a 68 Dart with a 73 V8 K frame. It had power steering and a 318 from a 73 Dart, now its getting a 383 with Hedman headers. I have a 69 manula box coming which I am pretty sure will not fit, but I have had a very hard time finding a 73+ manual box.