K10 - I used a 69 mustang master in my 46. I had to build a bracket for it that bolts into the same place as the original. It's kind of an L shaped thing that has a big hole for the new master cylinder on one leg and the other is drilled to match the original holes in the pedal assembly. The biggest problem I had was drilling the big hole for the master cylinder to go through, fortunately a friend had a hole saw for metal. Worked like a charm.
The other thing I had to fab was the push rod. That's pretty easy, I just cut off the eye on the pushrod that came with the new unit, threaded it to mathe the existing one and joined them to gether with a long connecter nut.
I hope this makes sense, I wish I could post a picture but, you see I'm digitally challenged.
If you need more info on how I did this I'll be happy to help.
George
