1st part you stated I agreed with , but not this part. People said that about 500hp SBC's in Corvette's before the LS7 came out......which was true.....but times have changed. (Link) Look at what the LS7 can do. If it was rated in GROSS hp like most guys rate their SBC's to make it sound cooler, it would be in the 600hp range. ~600hp (Gross) and 16mpg city / 26mpg highway with a 10.99 ET on Drag Radials is something no one thought was possible.......that motor is bitchen wicked. Of course, several other key components in the Vette help that happen as you stated, but it's obviously feasible!!!!!!