Hence I always suggest people with GM ones refurb them, rather than replace with crap. Its a bit extra work, but cheaper and will last longer.
Is there any easy to spot tell tale that they are original GM? GM logo somewhere?
They'll look like they were rescued from the Titanic; rusty and covered in crap off the road. You're getting bogged down in details that are unimportant.
You've got new wishbones, so fit the front poly bushes and get them on the car. They'll be an improvement. If the removed ones look vaguely saveable, keep them. If they don't, bin them. To me, the only thing the originals do better than refurbished ones is that the ball joints are rivetted on, not bolted.
I was just curious really, if mine turns out to have GM ones on it currently I'll save them and refurb for next time. If not, they can indeed go in the bin.
