So many engines...

If you need to drive it every day drop the idea of the blower. Big block A bodies are cool but I think a small block package is preferred. If you have the 318 and want to use it, I'd stroke that. There are quality crank packages available, the output with pump gas fits what you want, easier physical fit, easier maintenance, easier to pass off as "just a ***" at the cruise night or track, lower overall cost. That's my recommendation.