Lift bars are a completely different set up then just control arms...do a search and read how many are running them and gain great 60 ft time.
I have the UMI lift bars on my 87, and wow! I couldnt beleive the way it hooks up. The lift bars change your control arm geometry and use your cars to torque to plant the tires into the ground and pull the front up, hense the name "lift bar"
As for the torque boxes, buy a set of the reinforcements and thats all you need. You can tear your stock boxes with a stock control arm, not just lift bars. I got the lift bars, adjustable uppers and my pinion angle at -6 degrees at the track. I am cutting some crazy 60 ft times.