I'm not saying your incorrect, but centrifugal superchargers need rpm to work, sort of like a belt driven turbo, where as the roots type blower make power instantly off idle. I know I've heard about the valve cover issues, but it may be on the larger units, I hope your right though for 4K for the blower plus 1K for a carb I would expect a true bolt on, not to mention fuel system upgrades.