Radiators: Is 22" enough for 400 HP?

I'll guess that the crookedness is due to the rad sitting on the bottom edge of the core support. I'd push down that lip on the core support for 2 things:
1) Get the rad straight
2) You don't want that AL rad restring directly on the core support; it will chafe the AL and may eventual wear through

You can avoid some issues with the bigger alternator and the ammeter by putting the fan through relays directly from the alternator. Of course, that won't fix the big alternator pushing a high level of charging current into the battery via the ammeter....

Yes, I would definitely like a bigger alternator. Just don't know what direction to go with that (still confused on what alternator will easily bolt on without spending a fortune on brackets). I guess it's a good thing that my ammeter is gone (well it's not connected so it's a dummy), so I don't have to worry about that anymore.

The side where it's sitting on the core support is actually the lower side of the crookedness, which is the driver's side.

On the passenger side, I can slide my fingers underneath the radiator from the far edge towards the middle where I can't go any father. Hopefully that makes sense.

I was thinking that I can lift it up a bit on the driver's side using the "2x paint stick" method, and then lower the passenger side to match. I can use the pre-existing holes in the core support (same holes I used to bolt it up previously) to mark the radiator bracket to make new holes in the radiator bracket. Then drill new holes in the bottom through the core support, and it should be a done deal.

Right now I'm just trying to flush all that nasty junk that came out of the block and old radiator. Well, I'll have to wait until the weekend to do all this.