Popping and clunking from front of car
Lately I've been noticing popping and clunking from the front of my '71 chevelle. It often happens when braking (the harder the braking the more likely a noise will be heard, but it doesn't have to be hard braking), gently accelerating forward from a stop with the wheels turned in either direction, and hitting light bumps at moderate speeds. Some months ago I had a reputable front end shop do an inspection to see whether anything obvious was loose. They found nothing. The noises have continued to grow more frequent since then.
I'm not a suspension expert at all, so what I'm asking is for suggestions for stuff to look at. One thing that worries me is that my mother had a '68 cutlass, and the frame broke somewhere along the left side towards the front of the car. This was in the early 80's, and she was simply backing out of the driveway when it happened. I'm assuming the frame of my car and hers are very similar if not identical, so is this a known problem with these cars? If so, where do they tend to crack?
'71 chevelle, 468, TH400, 12 bolt posi w/3.08's, drinks a lot of 87 octane.