Land speed record

I notice he has those Airtab Vortex Generators on the LSR coach. I wonder how effective they would be for those of us who travel at reasonable
speeds? :) Steve Ferguson's new SOB has them on the rear as well. They claim a 2 - 5% increase in fuel economy. I always thought, with the curved
body of the GMC, they probably would not make much of a difference, but maybe not.
--
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles,
Solar battery charging