rusty52stovey,
IMHO...two carburetors will work fine with an almost stock engine. To get the most out of the 'in' improvement, a corresponding 'out' modification works well. This means some headers and dual exhaust. Another bolt on that finishes the picture out would be some type of high energy ignition or solid state ignition.
These are about all you can tack onto your engine without going inside and doing major work. The dual carbs, dual exhaust and fancy ignition wake it up to a noticeable degree and it all looks good to boot.
Stuart
