If you're going to block it off (which won't really get you any performance gain and will use a touch more gas, as stated) be sure to get a reprogrammed chip.
DON'T just fake out the system. If you fake out the system, you will run too much spark advance and too lean fuel mixture.
THAT is what hurts the motor (and also what helps the fuel mileage when it's working properly.)
88 Formula IMSA Fastback. 4.9, NVG T550
Praise the Lowered!