Belt guidance

No, no, no; that's all messed up!
Firstly the alternator pulley is on backwards,
Secondly your Waterpump is wrong for a 67, that pulley will never work,
Thirdly the alternator appears to be spaced too far forward. and
Fourthly, that Saginaw has an exceptionally long nose on it. I can't recall ever seeing that in an A-body.
Methinks
Yur gonna have to get some different parts, and Ima thinking you may not find a WP pulley to work on that pump.
Furthermore, IIRC Magnum truck pumps that had the serpentine belts, were reverse rotation pumps; so make sure yours is not one of those..
FWIW
I think the damper will be right, for the correct 67 parts or
Maybe you can find one that sticks out far enough to work with the current WP and PS pulleys, and then you still have to deal with the alternator spacing.

Here's the deal, to shift at 5500 or more, your belt alignment has to be spot-on, else the alt-belt will fly off, leading to engine overheat. Take your time, and don't rush this. If the belt flies off once, it may fly off again. So once you get your pulleys bugged out, get a spare belt.

Oh and FYI,
1) the PS belt always goes closest to the rad, and
2) flex fans are a known trouble spot. Engines with those lean towards overheating in traffic, and the blades have been known to occasionally fly off.
With as much room as you have there, I highly recommend a 7-blade all-steel fan, from a 318 car with A/C, and put it on a thermostatically controlled viscous clutch. You will never be sorry.