M14 bolt is sport models yeah.
M12 bolt hole was all non sport (1.2/1.4/1.5/1.6), which is the same bolt size as a Mk1 Valver/Williams.
AFAIK from reading, and from dialogys/tech notes, all non-sports were either 52mm or 58mm........but oddly the Mk1 Valver/Williams were the same hub (use same caliper/disk/bearing) with 54mm spacing, not 52mm or 58mm.