Reliable brake work in Calgary

So Geoff at Shawnee pointed me to a guy who used to work for him with his own shop and a lathe to turn the drums. He did a good job, but he's no brake man. The pedal is still soft, so we determined that the master cylinder is bad. Pedal drops but fluid level doesn't. So we pulled the master cylinder today. I ordered a new one for manual drums all the way around and it is not going to fit. Now I need help again. No site I have found shows a master cylinder for a 1974 Dodge Dart with a pushrod coming out of it. Do I have the wrong master cylinder in this car? I would not be surprised, it had the wrong transmission in it when we bought it.

If it's the wrong one, what do I need to order or find to connect the pedal to the correct cylinder?

Thanks in advance!