I noticed the 250 damper has the pulley on the wrong side of the rubber. And I'm a nitpicker about belt alignment.
I also remembered wrong about the 03 Isuzu, it had some kind of air brakes.
I bought a Hydromax booster and a 1.75 master cylinder on ebay. Total cost $250. The fun starts with the fittings and lines. The hydromax with electric backup is from a 2002 Chevy C6500 so maybe it's not just an old Ford thing.
I haven't fallen in love with the old stovebolt enough to do a serpentine setup, but maybe with time!