Sway Bar and LCA Question

I have an odd question. First, a little background - when I built my car, the guy that reconditioned my K-member swapped the original LCAs (with no sway bar tabs) for a set of LCAs that did have mounting tabs. It was not until later that I realized that he used LCAs that are 73 and up because the tabs are more inboard and the sway bar I had bought (meant for my 69) would not work. My question is, if I buy a sway bar meant for 73 and up, can it be mounted under my 69 given the LCAs that I have on the car? Or are there are issues that come into play (like K-member design or something like that)? Would appreciate some advice from FABO. Thanks.