OK got those measurements for you, hope these make sense.
Front two bolts, 107cm apart. Rear two bolts were 68cm apart. Measurements from front to rear bolts were 63cm.
Note all these measurements were taken from the TA63 Carina floorpan sitting upside down in my shed with the F series diff removed. This means totally unimpeded access so you may need to factor this in when measuring up your car as I assume it is still assembled.
Let me know how you get on or if you need any clarification.