My 74 spider pulls to the right very hard when braking. It is not safe to drive. I had the ball joints and the shocks replaced by someone else. Before I took it home from the shop the spider began to pull hard to the right. I took it back to see if they can look at it. They said that they hadn't touched the brakes, I was wondering if there was something that they could've moved while working on the ball joints and shocks. The brakes were perfectly fine before taking it there. I'm not blaming them for messing up the brakes, I'm just keeping all possibilities open in that they might have moved something without knowing it. What do you guys think it could be? Could it be that the calipers need to be rebuilt or that the master brake cylinder could be leaking and air would be rushing where the liquid should be? What do you think? Thanks in advance!