Favorite:
LS Swap (fuel mileage
![headbang](http://67-72chevytrucks.com/vboard/images/smilies/metal.gif)
)
Ridetech suspension (this thing rides smooth as silk but still handles amazing)
Carpet and insulation (much much cooler in the cab)
Least Favorite:
Magnaflow exhaust (for what this thing cost and how poorly it fits, I am still peeved at spending the money on it vs. building my own. It does sound good though)