I still have the stock heads....I went with older version of VT's blower cams( i wanted it quiet ;) ) and I still have the stock lower intake but I did add a plenum and t/b for increased throttle responce :)
I've had so many great experiences with them...
this is probably the thread you want to read about them:
http://www.modularmustangs.net/showthread.php?t=5548
but bare in mind this is just one of MANY threads regarding them:)
This was saturday at MMP in Alabama. Not many people showed up so I limited to footage but here it is:
http://www.modularmustangs.net/showthread.php?t=7933
There are at least 7 vids up plus i'll be posting more including the races between a supercharged viper VS a z06 with a supercharger...