Disk brake help

I did a front end job on my 71 Demon a year and half ago or so. My car had gone through some changes before I got it too. Had a different K member. The kit I got had some wrong parts because I ordered for a "71". The k member was from a 73 up. If you tack front pads to parts store ( how I found out what I had) and ask for 71 and they don't fit ask to compare to 73. I would do this before ordering kit... There is probably another way to figure but I am newer into this too.