Wes, trying to find a small block crate engine that will run like that will be almost impossible in my opinion, and costly! How much is salvageable from your current engine? A good shop might be able to use some of what's left and put something together for a reasonable cost. If you want a complete engine to bolt in, I'd get a hold of Mike Liston @ MRL Performance.....
http://www.mrlperformance.com/