What I have found for Buick Skylark GS is that the 69 and up hub does not turn down well it leaves a large gap between the hub and column. The best I have found for a 65/6 Skylark GS, if you want a later model Buick 3 spoke wheel is to use a 68 hub. Used on 68 Buick and Olds. It is slightly larger, but will turn down and not leave a gap and the wheel will fit. The 68 hub will work on 67 without any modifications.