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I aimed for the instant center (intersection) of the arms to be at the front of the car.
This would be anti-dive on the front suspension but pro-squat and pro-lift on the rear suspension.
The way I look at this is understand the motion of the axle pin compared to the chassis as it rises and falls. If the motion of the axle pin is completely vertical with no fore and aft motion, it is neutral. If the axle pin moves a little bit forward or aft during it's vertical motion then it has some "anti" or "pro" tendency.
For example if the axle pin moved forward 1/4" at full squat that is saying the force of acceleration has also lifted the chassis forward by 1/4" as part of the work of accelerating.
I think your brackets don't need to completely wrap around the tube. 2 or 3 sides might be stronger because of less welding heat and damage going into the underlying tube. Also there should be a diagonal somewhere, at least on the bottom. In can be inside the box you are building or outside.