Bare with me for my lack of knowledge on this but I want to make sure I do it right. I think my upper control arm bolts are the original bolts both the front and rear. I am not so much worried about the rear bolt as it looks just like a standard bolt.

The front upper control arm bolt has the standard nut on one side which I can loosen no problem but the head of this bolt is almost flat and has what looks like a little plate that is folded over. Its fairly rusty and is not budging.

Once I loosen the large bolt a little on the one side I cant even tap it out.

I could cut these bolts out and put a M10 X 1.5 X 90mm standard bolt in but what about this piece that looks like a little metal plate that is attached to the existing bolt?