Got all the belts on the 78 F150, she's whole again. No more squealing alternator belt, AC works great!
Yesterday was a fail: I tried swapping out the power valve on the 67 Bronco for an 8.5 valve.. got it all back together and had to have my foot on the gas to get it to run. Took the fuel bowl off, checked my work several times, tried old gaskets, old power valve, etc over and over and got the same result. Not sure what I screwed up but I ran out of time. I just don't have the time/motivation right now so I dropped the carb off at a shop in Santa Ana that has a stellar reputation. He'll rebuild it and then wants me to drive the Bronco to his shop where he hooks it up to a machine and tunes it further. We'll see how that goes.
Frankly I'm tired of working on the gf's Bronco because I want to focus on the F150. The Bronco runs/drives fine except for that stumble. With that said, I'm turning my attention to the 1-ton axles and getting them ready for now (remove dust-shield, rotors, calipers, brake lines/hoses, clean-up track bar mount for a custom mount).