This is what I did for my car. I use these tie downs for the chassis dyno. The front brackets I make will also fit on the rear of the car if you prefer to tie down the body rather than the suspension.
I did buy two sets of yours for my bee but couldn't find a good spot to attach them to on the rear of the car. I didnt't see the shock plate mount pictured above. That looks like a nice piece as well.
I think you can use one of the bolts that holds the bumper bracket to the frame. At least that worked on my '65 Coronet but it might not work on a new car.
