edelbrock intake manafold for vortec heads. designed for carb, but there are TBI adapters and TB adapters....Most common mod for upgrading the fuel system, aand putting some real injectors in the motor (MPI setup requires some fab work/computer tuning)
2114 is the model number of the 4.3 Performer Vortec Intake Manifold made by Edelbrock
It is designed for a spread-bore 4bbl (like a quadrajet) but can be adapted to Multi Port Fuel Injection which is what most people on here are doing.
Drilling a hole in each intake runner and welding in a injector bung, fabbing up some fuel rails, and getting an adapter to go from SB4BBL to the stock or other throttle body are the mods needed to run MPFI