Ha- me adding pics "tomorrow" = fail!
But I got it together today and survived the test runs. I used the big water pump pulley and the +13% alternator pulley. I welded up a new lower alternator bracket from angle iron, and modded a top bracket (with old school adjustment slot) from an old 327 Chevy engine. I put the old belt back on just to hold it tight and make marks on it, then went to the parts store to match one up. The belt ended up being 45% shorter than original at 48" vs 86".
Been driving this thing for 12 years now so suddenly having "Armstrong Steering" was a surprise, even though I knew it was coming! Only noticeable at stops/low speeds; on the road is functionally no difference at all. Will have to try looping the lines.
Once I gain experience and get comfortable with this setup, I will push the envelope further by re-mounting the old water pump pulley onto the alternator. Then the alternator would barely be turning faster than crank speed.
Junkyard pulleys: $10
Bolts: $1.95
Belt: $11.75