Here are the cheapest decent Pontiac crate engines I've seen advertised.
http://lenwilliamsautomachine.com/Home.html
But, I've been criticized for recommending this builder, since I've never bought a engine from him. And, some say he must be cutting corners, in order to sell that cheap. So, I'm not recommending this builder--just providing the link.
If you can spend closer to $10k for an engine, there are LOTS of good Pontiac engine builders. Some post on this site.
Not aware of any builders in Florida, unless P dude is building them again. Anybody know ?
https://www.facebook.com/kensautomachineshop/?ref=br_rs
https://sites.google.com/site/kensautomachineshop/