When I put the car-in-a-box together, the first time, I used salvage parts. Because the subframe was already out of the car I was putting together, I had planed on installing a complete subframe with suspension, engine, and transmission intact. As mentioned, the subframe looked cherry, but as I unbolted it, one side of broke away from the car before I got it unbolted, because the mounting areas on the subframe had rusted so bad that it just fell off the car, leaving the body bolts in place.

When I finished the car, I had a pro install the bushings adn I was his gopher. He loosened up one side, leaving one bolt loose but threaded and removed the other bolt. We used a couple of bf prybars and wooden wedges, slid the bushings/washers in place, bolted it in loose, then moved on. We didn't mess with the rag joint, and it was a fairly challenging job.