Needs modifications
The IAC has to be ground off where it hits the BBK housing to get bolts to aline. The adapter plate will not seal with 5.7 Vortec OEM embedded gasket had to make one. It only comes with 1 gasket.

FEATURES:
VEHICLE FITMENT:
Improved Power and Throttle Response
Increase throttle response and power output from your Vortec V8 powered 1996-1998 GM Truck with this BBK Performance 80mm throttle body. BBK Performance throttle bodies create quicker throttle response and better acceleration. This throttle body will increase airflow to your engine adding more horsepower and torque to the wheels.
Top Quality Materials
BBK Performance throttle bodies are CNC machined from high quality 356 aluminum castings to ensure perfect OEM quality and fit every time. Features die stamped throttle linkages double sealed bearings and o-ringed throttle shafts.
Easy Installation
This throttle body is a direct fit replacement for a hassle free installation. BBK Performance throttle bodies are designed and manufactured in the USA. New gasket, hardware and spacer are included.