Can somebody please identify these disc spindles

F body would have had slider type caliper brackets, I think. Those have pin type caliper brackets. If you have any BBP A body rotors around, see how the inner wheel bearing fits those spindles. If it's to big, those might be 72 or 73 B body spindles. 73 B bodies had some weird K frame that was isolated from the frame rails with rubber bushings and the spindles were taller to compensate for the thickness of the bushings. Jim @hemi71x can probably eye ball em and tell you exactly what they are.

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