Sorry I don't know what they are off from.
From history...........mine are from a Carmao/Cadillac El Dorado. And the e-brake moves a lever similar to what yours looks like. But yours looks more heavy duty. I have to jockey around the cars tomorrow, I will pull the rear wheel a get a few pictures. A friend of mine is coming over to finish his 66 GTO up and we have to put it on the rack. .... and that require to move the two cars under neath the rack system.