1960 Apache Restoration

[60ApacheDude]

I'm currently working on restoring a 1960 Apache short bed, step side. This is the first time I take on such a big job so I'm reaching out the experts for some advice. I recently upgraded the braking system to disc front brakes with a power master cyclinder. I kept the rear as shoes because I didn't want to change the entire rear. Nonetheless, the next things to work on are rebuild the engine (350-V8 from a '78 Malibu), convert the four speed manual transmission into an automatic 700R4, rewire everything (American Autowire Classic Update) and new exhaust system.

Obviously I cannot do all if it at the same time, what order do you recommend I do these upgrades?