One of these along with a newer OD transmission and a better final gear ratio makes a lot more sense then spending a lot of bucks trying to fix up a 30+ year old 350 to to run (possibly unreliably) with a car that already has one of these under the hood - from the factory:

http://www.gmperformanceparts.com/Pa...l.jsp?engine=2

Aftermarket superchargers/blowers are not always the best choice.