depending on the engine and heads it comes with (some have threaded holes in the ends of the heads and some don't) you have a couple of choices for alt brackets. this is a link to the old style heads with no threaded holes and no power steering
http://67-72chevytrucks.com/vboard/s...d.php?t=537669
ebay
https://www.ebay.com/itm/CHEVY-ALTER...-/262325700355