Front Disc Brake Spindles
I know for a fact 73-up a-body disc brake swap is simple. If your looking for better brakes that dont pull to one side or other, find 73-up a-body(large bolt pattern 1st year) and take lower control arms(for correct spindle) upper control arms and rotors, and discs. You'll also want distribution block(for proper brake balance). Its a very easy swap, not period correct, but much nicer braking.