May have warped or bent tubes, but can't tell unless you dismantle it and slide some bar or tube stock through the housing to verify. Don't know your wheel/tire combo, but if you narrow it to 53" you can get a 15x8 wheel (4.5BS) on there with up to about 12" of sidewall width; stock '66-'67 width means narrower sidewalls. Less than 53" makes it hard to access brake adjustments & get spring/tire clearance. I think Dr. Diff here sells a conversion bearing so you could just change your axles to the later style, but I'm not sure. Wagons seem tighter as far as wheelhouse width than sedans based on what I've read here, and all I know is my '63 & '64 wagons.