Alt , water pump and crank takes the same belt, power steering to crank takes its own belt on a bb 67 to 71 set up. 2 pulley lower crank pulley, you can have db or single belt alt pulley. Big block and small block are different pullies for water pump and no ac. A deep sb water pump pulley will hit the water pump. The bb wp pulley for non ac is deep enough to come close to the 4 wp bolts.
under 60 bucks buys you the bb bracket system complete with bolts and spacers. and usually you can find a pair of pullies for your crank and wp for under 100 bucks. This is the most simple way to do a stock set up with the correct system and speed ratio for fan and alt. If you keep it simple, like what was designed. You will not throw any belts or end up with bearing ware n tear on bearings. Plus, you can buy stock stuff over the counter this way and know it should fit with no issues. Like stock size fan belt