You guys are debateing about nothing that this thread has to do with just

The fact is 500 hp IS 500 hp weather it is a BB or SB if the car is tuned to hook perfect and keep the engine in it's own power band one will not be faster than the other. The SB will make less TQ but will end up with a lower gear ratio and TQ at the wheel will be the same.

As for you guys and your peeing match, 500 hp is easy with either combo and costs about the same with either. A 1/2 decent port job on a X head or a 906 and similar priced cam intake headers carb... will make 500 hp. Machine work is the same and every component is going to be almost the same $$$. The SB will naturally turn more RPM to make the same HP but so what, matched with a 904 instead of a 727 the SB combo is going to be nearly 200lbs lighter. A 4 cylinder civic can make NA 500 hp and no TQ, they will just run super low gear ratios and turn the 500 hp into the same TQ as a 440 at the tires and the bottom line(the bottom of the tire) is what matters, it can still run as fast in a 3000# car but it just needs more gear to get the same TQ at the tire... of course a 500 hp honda is VERY much more expensive.