Car-Kit NOX

The EGR system was also designed to reduce NOx emissions, although lowered compression ratios were the main method employed at the time.

As for the hood scoop or dual snorkel setup, I'd go with the dual snorkel myself. Now, will a true cold air intake system make enough more power to justify the additional weight and complexity? Perhaps. Would a hood scoop be better at impressing the ladies? Probably.