Want advice on bagging & Z-ing frame on a 63

[Popcorn W]

Hi, new guy here looking for advice on a project.
I just picked up this 63 short bed fleetside big back window and I'm ready to start on it.
I've seen so many excellent builds here so I knew I had to join.
My main inspiration was jdoisher's build Maggie's Custom
http://67-72chevytrucks.com/vboard/s...d.php?t=531177
Here's a couple pics of when I brought it home and where I'm at now.
This has to be a budget build.
I bought step notches which came in a couple days ago. I'd like to use the factory trailing arms.
But, I'm undecided what to do on the front. First guess is to Z the frame and cup the LCA's. I was going to get drop spindles until I found out I have to convert to disks. Disks are fine, but again with the "budget build" thing.
Any suggestions/opinions are welcomed.