Justian;97028 wrote
This is the measurement I am after
Have you looked in the 140 / 164 Green Book for the body? IIRC they have the control drawings with measurements to ensure correct body alignment during crash repairs.
As you know, there are 4 bolts which hold the crossmember onto the chassis rails. If my recollection is correct, the body Greenbook gives the measurement between those holes.
164 and 140 crossmembers are the same; IIRC the upper control arm bushes are different.