When I first got my '80 Pinto 2.3 wagon, I took the '74 Mustang II 2.3 suspension out and put it in the Pinto. Pinto parts were dead, the Mustang parts were almost new, car taken out by hailstorm. Used the entire upper/lower control arms, rolling disc assembly and thinking strut rods too. Used Pinto springs. I remember there was something slightly different between the strut angle at the back end of struts and something about drilling a hole(s) slightly bigger to make it work, maybe the strut bolt holes in the LCA. I was surprised that the control arms all went right on, I had an idea before that time that the Mustang was a substantially stronger built car, that helped dispell a lot of that. After I lined it all up the car ran amazingly well and straight as arrow.
I was going to rebuild the Pinto 4 speed too but could not find an output shaft at the time that was not too expensive so pulled the Mustang C-3 ATX, rebuilt it and threw that in Pinto too. Wishing I'da pushed hard enough to get a pre-electronic control A4LD, they were practically giving them away back then.