Looking to converting my tbi to sepentine belts.Question is can I use the set up off a astro van 4.3 on my 5.7 350 chevy.

yes they will work

yes sir.4.3l is a small block missing 2 cyls.all the bolt ons are the same.ie.waterpump,alt,starter,a/c comp.belts pulleys

if you replace the v-belts with serp you need the serp water pump that turns opposite direction, just a reminder