Found this forum while looking for some help with a Chevy Caprice.
I don't know if there are any differences in the systems between Australian and American Caprices, so any help is welcome.

My grandad recently gave dad and I his 1973 Chevy. When you brake, it pulls to the left. I have been told that the left and right braking are seperate, and if the brakes on one wheel stop working, the brakes on that side of the car shut down entirely; front and rear. Is this the cause, or is this crap I have been fed about the brake? What else could be causing them to pull to one side?

 

I've never messed with a car that old except for my 79 corvette. honestly Ive never heard of the braking system your talking about. sometimes a car pulles like that when it has a bad brake caliper or bad wheel alignment.