I am looking to set the ride height and wonder if there is a dimension from the ground to the top of the wheel arches front and rear.
Presumably this will be with with the weight of the driver and a tank of fuel
While measuring the wheel arch height from the ground seems like the obvious way to assess the ride height I don’t think it’s much use in practice. Variations in body construction over the years (and repairs) make it too inconsistent. I think mine differ left to right by 1/2" or so.
Why not stick with the suspension pictures shown in the manual: ensure that the lower front wishbones, and the rear A frame wishbones, are parallel to the ground (when the car is loaded). Adjusting the front can be done with adjustable spring/damper units. As for the rear, somebody in the forum will know how it’s done - mine are OK so I’ve never had to figure it out.
I think this will get you where you need to be, or thereabouts. If the front arches then prove to be close to the wheels you’ll need to check that they won’t foul when going over a bump on a tight lock.