Not sure if you're a Nascar fan or not Doublevision but look at what they do with 358 cubic inches? 800-900 horsepower?, no blower, turbo or NOS. They do it by using small journals, long rods, high RPM. They pay close attention to tolerances, coating and finishes etc.
I know I am comparing "apples to oranges" but there is something to be said for things like bearing speed, oil control, rod/stroke ratio etc. I only have the budget to do this ONCE so attention to detail to help the motor live is important. I would rather spend a little more on the "blueprinting" and detail work to the shortblock than build it all over again after picking it up off the asphalt.