couple of questions...and funds are really low, but i need to keep her on the road....speedo was reading slower that actual speed then stopped all together...any suggestions?.............right rear sags really bad..is it possible to tighten the torsion bar?........is it possible to do a front end alignment myself that will get me through the winter?.......the low range shift knob is unattached and just spins, is that a big deal...........and front rotors are shot and lines are really rusty..can they be replaced with flex lines? thanks in advance for any and all help