[68LSS1]

I think the stock ones will be fine. I am contemplatong "boxing" mine though. If you are worried about changing the pinion angle you can get shims (wedges) for between the arms and axle seats. As for the front you can remove the rivets holding the front arm mounts, slide the mount down so the original top holes pick up the middle and weld it up. The mount will hang a little lower than the crossmember it attaches to and I would weld a little angle gusset here. Keep in mind with the trailing arms they don't give like leaf springs so as you load the rear end, the pinion will try and turn down, not up like leafs.