That hella sucks about the shop not getting your truck done the way you wanted, taking so long and off center too. For your steering you might be able to use a Ford steering box from a 80s F350 truck, they mount on the inside of the frame so if you set the frame up right you should be able to mount it to the outside of the frame on the passenger side & swap the idler arm to the drivers side to keep the stock center link & tie rods. When I bag my dually I'm gonna "Z" the front, stock floor body drop & back half it at the same time. I'm gonna keep it simple, gonna make the rear of the frame as high as I'd need a notch so I can mount my bags & lower links right under it to keep the width down, also so I can fit semi wheels between stock width dually fenders. I'm also gonna raise the whole bed floor. This should also make hooking my 5th wheel back up easier too. Those frames with all bends look cool on mini trucks that don't get used as trucks anymore. I believe a work truck can be bagged & still used as a work truck if done right, built simple & still look clean. Here's a crappy picture I made to give you an idea of what I plan on doing.