Got an 83 Ram Charger with a 440 today!

A/C big block trucks use a double groove water pump pulley, and an idler pulley mounted to the PS brackets. Idler on the outside groove, and PS on the inside. Alt-A/C routed the same as a small block. Factory added the second belt/idler to pull the seven blade fan used on A/C trucks.

A double groove WP pulley and matching crank pulley should allow factory routing of the PS belt using A/C equipped brackets, you'd have to realign the alternator to the outside groove since you're not running A/C.

Non A/C trucks may have used the same PS brackets, and different alt brackets as described, only seen one, that was thirty years ago, can't remember.