7.25 Gear Swap

I Dont Mean To Sound Like A Puss...i Could Do It, But Time Is An Issue, Plus Im Rebuilding My 340 S Cuda, But How Much Would It Be To Get My Hands On Every Thing Needed For The Swap To An 8.25 With 3.23's And How Much Would It Be To Get It Installed, Say At A Trans Shop Or Rear Shop? I Would Definately Like To Have This Rear If It All Can Be Done On A Poor Mans Budget.lol.thanks.