Hello, I just thought about this and need to makes sure of something. Is the z bar on my 69 GS going to be the same as the one for my '69 Olds W30? The one from the Buick has been welded on at least once and therefore need not go back in the car. Any help would be great. Also, the ball stud at the block is shaped different than any other GM that I have seen. It seems to have provisions for a tool to install it in the block.....?