i ran a road demon 625 for quite some time, never had a problem, and was a significant improvement over my holley 4010. i switched to a holley 600dp 4150 that i modified for blowthru supecharging. if BG made a demon for blowthru i probably would have bought that vs. modding my old holley. i'd say you can't go wrong with either the road demon 625 or a holley 600dp.