Bit of an update. Still no real wrenching on booger until my garage frees up. Got the donor cab completely stripped. Keeping a lot of extra parts such as dash parts, wiper motor and linkage, harness, gauge cluster, trim, seatbelts, floorboards, air controls and vent pieces/tubes, etc. I'm selling the hood, doors, bench seat, and fenders and such but will keep the rest of the cab and engine bay parts I pulled until I finish with Booger and then sell what I didn't use or don't want to keep.
The floors were definitely rustier than advertised but I've far surpassed my cost of the cab with parts I've taken from it so I'm happy. Booger's driver seat mount, underseat floor boards, sides of the tunnel, and sides of the floors where it meets the rocker are all rusty and those parts of this cab are solid so I'll be using those. However, the pedal box area floor is rusty on this one too so I'll likely guy some C2C floor board patches to fix those.
Last step is to cut the floors out and any other metal I want to keep. Then the cab will be offered up and scrapped if no one wants the carcass.
My new windshield gasket came in the mail so that will get replaced soon as that's the main source of the water leak in the cab and reason why the floors rusted so badly.