Belt guidance

Looks to me like you've got '69 and earlier brackets and pulleys on a '70 and later front cover & water pump. The two generations of water pumps have different depths and use their own different pulleys and brackets which is causing your mismatch.
That power steering bracket is unlike anything I have seen (and I've seen a lot), there should be a front bracket (missing on yours) AND a rear bracket... I would definitely not run it like that, you could tear the reservoir apart.
The belts should be: Alternator, water pump, and crank; and P.S. pump and crank.
(P.S.- Guys, the Magnum water pump has a completely different bolt pattern and will not even fit an LA timing cover.)