Location of A Pillar Grab Handles on 60

[Landshark]

I have a pair of "A" Pillar grab handles that mount upfront near the windshield on my HJ60. My 1987 does not have the holes to accept the bolts so I need to insert a threaded nut. What I need to know is where exactly to drill the holes i.e. X inches from the upper corner of the windshield. I believe the FJ62 late models had these hand grabs. Thanks.

Bob
1987 HJ60 470,000 kms