Unfortunately the engines I've found on craigslist were all already pulled, so while a $300 258 would save me money right now, I think in the long run it might make more sense to get the remanned. That's how I'm leaning at the moment, anyway.
By "newer" they mean pretty much anything fuel injected, which I'm not entirely opposed to, but I did put on a brand new aluminum valve cover and Motocraft carb last summer. However for the right price, it's something I'd consider. I originally planned on keeping it stock, but after the valve cover swap that idea kind of went out the window.
Thanks guys, I'll keep you posted.