Driver's side, front sub-frame.

69FBCuda said
Sides and bottom are solid, there is rust pitting along the top at the suspension. Before and after hosing it down

https://photos.app.goo.gl/apKHFmfeiNSqEZfZ8

Thanks for the pics. My rail is in the same condition as yours. I'm removing the inner fender skin tomorrow, to get a better look at the rail. I'll get back to you regardless.