stock LS1 > HEMI
it could have been the 340 HP hemi in there, those will definitly get out run by an LS1 F body. if it was an SRT8, it would have a hoodscoop and probably would have kept up with you pretty damn well. hell, and srt8 might have even beat you. But they do weigh 4000+ pounds so I wouldnt worry about them too much.