I noticed alot more lowend torque and throttle response. I think it would depend on your current mods and setup.
If I tromped the gas pedal, the truck would insist that you were seated and holding on.
The group at thirdgen.org swear by it, in conjuction with some TBI porting and/or other mods. I was going to port mine, but am now back in school and don't have the time. Hoping to upgrade to a newer chevy later this year, so I'm putting her back to stock.....well, mostly.
This was my year for smog-test and California don't like when you go messing with fuel delivery....