Removed the old vacuum booster and went shopping at the pick-a part. Found 5 or 6 Astro vans but went with a 94 with pretty low miles and fairly clean. The cylinder was tight and did not spin so it looked like pretty good choice.
the Astro hydro boost bolted right up to the bracket I bought from Captainfab for the vacuum booster.
I grabbed the metric O-ring hoses off the Astro. I cut them apart and then had NAPA crimp on some fittings that have 3/8" compression style connections which made installation a easy thing.
I bled the brakes and the power steering and went test driving. Pretty nice brakes now. Maybe a little too soft and touchy . Might have to drive it for a while and get used to it and see if it will work.