All back together and runs fine again.
The reverse rotation 454 fan fits fine, but the leading edge of the blades is just slightly rearward of the shroud. I'd like to see the leading edges forward more, like maybe an inch.
The blade tips touch the top radiator hose if it's installed in the C shaped metal clamp that holds it to the shroud on the driver's side. For now I just have the hose sitting up on top of the clamp, but I'll have to resolve that situation.
I installed the baffle that closes off the driver's side end of the core, so that was a nice upgrade. A few photos for your viewing pleasure....
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