Someone know, which must be zero cone pinion depth in GKN C04HU differential ? Installed from 1990 and on years to jaguar xjs.

I know that Salsbury have 2.625 inch zero cone pinion depth , Dana 44 have 2.635 inch zero cone pinion depth.
The pinion from ( jaguar 83 year ) Salsbury is different from (jaguar 90-91 year) GKN :
pinions have little different dimensions from 83 and 91. The 83 pinion from bearing to the end is longer than 91 pinion
ring gears have little different dimensions from 83 and 91 too.
The pinions 83 and 91 have the same ratio : 2.88