WARNING:
LONG update to bring this thread to a
near conclusion.
Finally finished my FA rebuild along with new calipers, pads, and hoses! The process definitely took a little longer than expected but I took my time to make sure everything was done properly and cleaned as thoroughly as possible. I learned so much from this experience! Thank you everyone for your tips and suggestions. Here's my timeline (yes I know this is snail's pace compared to some of you others!)
Day 1 - Finished preparing for DS rebuild...had to clean rust off axle housing, pull oil seal, and set up everything for the rebuild. Got a late start and ended the day with having the hub and wheel bearings greased up, ready for install in the morning.
Day 2 - Buttoned up the DS, installed final components. Completed PS rebuild in half the time it took for DS. Started removal of DS FA to caliper brake hose. 10 mm flare wrench and 17 mm open end made the process much easier, along with PB blaster...no heat needed
Day 3 - Installed new brake hoses for both sides. Installed the NAPA calipers. Installed 100 series brakes pads (took a while to get them to fit - removed shims and had to use a sander to remove some material) FINISHED WITH TOTAL REBUILD! Tried to perform a brake fluid flush as best as possible with an assistant...rear right bleeder valve was faulty...leaked from the threads so we tried bleeding for a little while then moved on. Bled the remaining brakes. Did not bleed the LSPV since I wasn't going to risk crawling under the truck with 3 wheels off

Filled front diff, drained/filled rear diff.
Initial notes/thoughts: Took her for a test drive that night and the thing stopped like a champ, even with the sketchy brake bleeding. Only a few loops around the block and then 5 minutes or so on a 45 mph road. Everything seemed fine until I got home and did a quick inspection. Noticed a slight odd smell from front end...DS felt pretty hot. Took a mental note and prepared to drive her to work in the morning.
Monday morning: Drove 15 minutes to work, including the freeway, and all seemed okay until I got off on the exit. Noticed some grinding sounds, especially as I was pulling into my parking lot. The noise got worse and I knew right away something was wrong. Strong burning/odd smell from DS, hot, and then I noticed some small specks off shavings/metal on the inside of the wheel. This bummed the hell out of me but luckily I found some good threads on here after work!
So after research, without taking the DS wheel apart yet, I've pretty much determined that my upper caliper bolt came out. When removing the original caliper, I noticed that the upper bolt was a 19mm head. When I installed the new napa caliper, I couldn't fit the same bolt through the caliper so I ended up using a spare 17mm that I had gained elsewhere. Stupid me

Tried using a torque wrench and I thought I stripped the threads in the housing but left the 17mm anyways.
After reading several posts, I thought I had stripped the housing but then the 19mm bolt finally made sense. Someone in the past must have stripped the threads in the housing and drilled/tapped the hole to fit a bigger bolt (19 mm) so,
hopefully, my fix will be pretty easy. Just need to make the upper caliper hole bigger to slide the 19mm through and I'm hoping I'll be back to cruising!
Here's some pics of the truck/process...along with a nice gouge all the way around the inside of the DS wheel well from the caliper rubbing against it while driving. Also broke off a hub stud? when removing a hub nut for the right rear wheel..talk about unexpected!
