408 Troubleshooting: Won't Idle

So, I took a look at the underhood of the car for the first time since my last post. There doesn't seem to be an easy way of removing the water pump belt as there's no idler/tension pulley. I can't get an allen into my water pump pulley. It doesn't seem like I'll be able to remove the water pump without removing the radiator.

So, I think my plan of attack is probably going to be the falling:
1) Remove the starter to inspect the flywheel.
2) Empty fluids and remove radiator.
3) Replace water pump.
4) Inspect to see if things are fixed...

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