I did notice a fair increase in throttle response, not sure about power though. Overall, I think it's a great conversion, even if it's just for the more effective filtering of the air.
1961 USMC M422 (Shorty with Thin Windshield)
1962 Ford M151 (original paint/markings)
1964 Kaiser M151 downgraded to M151A1 config
flame throwers, Class 3
and an avid falconer