1969 Camaro Tie Down

[Thomas]

The reason that I am asking this is that I need to find a different place to tie down my race car on my trailer.
I was using the real end housing, but that allows rear of the car to bounce and is hard on some very expensive shocks.
So, I am hoping that someone knows how they were originally tied down during transport.
There is a picture out there of a bunch of Yenkos and it is obvious that they are tied down by the frame, judging how far the rear wheel is up inside the wheel well.

Normally, I would just drill some holes in the frame rail and fabricate a mount, but this car is cleaner than my 39,000 original mile street car and I just do not have the heart to drill through the mint frame rails...
The car shows 3,700 miles on the odometer and, from the rust free condition of the shell, I suspect that to be original before it was turned into a race car.