So just too reiterate, you're saying that your car now stops better with the Raybestos NOS liners correct? The brake shoes with the upper spring square hole are for the '69 and up models and I believe for the rears only. I could be wrong. My friend "Special K" knows all about these things. They will not work with the return/tension spring supplied for the early 60's round hole style. A longer spring can be used but for one sided as you mentioned.