Here's the guy that built the current engine in my Duster: http://www.dragracingonline.com/columns/baker/xiii_2-4.html
I've seen a de-stroked 350 Chevy ( approx 312 - 316 ci ) pump out 700 hp (carbs only - no juice, turbo or blower) on the dyno and Bob was trying to figure out what was wrong...