Clutch Pedal Assembly

I had just recently rebuilt my clutch pedal assembly for my dart, and I am using a 67-72 A-Body pedal assembly. However, when I went to finishing installing it, I think I may have misplaced a piece or broken it to hold the clutch pedal shaft in place, and not sliding out. I am uploading a picture where the section circled in red is where my problem is occurring. Any thoughts or advice to a solution? Thank you! IMG_2213.jpg