I worked on the springs today. The oval track springs use the larger B and E body shackle bushings. In order for them to work on an A-body, you have to get special bushings OR sleeve either the spring or the bushing. I have new A-body bushings here so I decided to sleeve the spring.

I went to the hardware store and bought a couple 1" OD black pipe sections. The OD was a little too big to fit into the rear spring eye, but the inner diameter was perfect for the A-body bushings. I went over to my father-in-law's house and used his lathe to cut down the outside of the pipe so it could be installed into the spring.