I would agree that it's hard to do better, and cheaper than the GM Vortec Cylinder Heads. Drill the steam holes, and make necessary cooling system mods. 400 ci, Vortecs, Dished Pistons, Edelbrock RPM Intake, 750cfm Q-Jet, Longtube Headers, Dual 2 1/4" Exhaust, and a slightly more than mild cam will do the trick. Good, proven cams that will give you the results you need;
http://store.summitracing.com/partde...2&autoview=sku
http://store.summitracing.com/partde...1&autoview=sku
Hope this was helpful,
-Jon