After looking at your build thread, you seem like you really want to keep this truck for the long haul.
While you have everything torn apart...this is what I would do.
@boy&hisdogs and
@1998_K1500_Sub and I have all done a heavy duty brake swap bc of our JB6 brakes. This swap consists of...
2500/3500 SRW calipers
JB8 Dually wheel cylinders
JB7 or JB8 Master cylinder (I used JB7)
Other items not necessary, but nice to have include...
Raybestos Element3 pads and Raybestos 473PG Shoes
JB6 drum hardware kit
Stainless Steel braided brake hoses
NiCopp brake lines all around
Here's a shopping list I made a while back.
Here's the JB7 MC you'll need
Should have all the major components you need. Also, if you plan on going this route, you'll need to replace the master cylinder, wheel cylinder, and calipers all at once bc mixing 1500 and 2500/3500 parts will result in brakes not locking up in tandem.
Here's a link for the SS hoses
Free Shipping - Classic Tube StopFlex Brake Hose Kits with qualifying orders of $109. Shop Brake Hoses, Sets at Summit Racing.
www.summitracing.com
Here's a link for the pads
Element3 brake products deliver a new level of control and confidence to drivers. Our premium brake line delivers what you've come to expect from The Best in Brakes with the addition of upgraded product
www.homedepot.com
Here's a link for the shoes
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Here's a link for NiCopp brake lines
NiCopp Nickel/Copper Brake Line Tubing Coil Description 1/4" X 100' Nickel/Copper/Iron Alloy Tubing - Use to fabricate 1/4" Domestic and adapter brake lines. When combined with tube nuts and flaring tool, coils are an economical solution for shops that want to build their own lines, custom...
www.agscompany.com
Here's a link for brake line fittings. I bought the big box so I have as much variety as possible, but smaller boxes exist
Tube Nut, Union, Adapter Fitting Assortment, 18 SKU - AGS Fitting Assortments are designed for specialty and general repair shops. Each assortment contains a specific collection of fast-moving fittings that should be kept on hand when working with automotive hydraulic braking systems.
www.agscompany.com
It's a lot to digest, so don't be afraid to reach out. Hopefully I've simplified it down well enough