Hi maxwow,
Welcome aboard the Chevy Chat II. You have come to the right place for assistance with your 58.
You are getting into a critical phase in the disassembly of your 58. I would suggest you invest in a reprint of the assembly manual for your vehicle. This will pay off in the long run.
Someone will pick up on this thread and tell you where to purchase this manual.
You may consider placing your question in the thread up above for the 58.
Good luck with your project.