Parts list:
- Vortec heads
- Fancy valve covers
- New intake gaskets
- Carb'd Vortec Intake Manifold
- Carb to TBI adapter plate
- 96-99 C/K Fuel Pump
- Might as well get you a fancy cam/lifter kit and a new timing chain set while you have it broke down as well (I hear the K1103 from Summit works great for Vortec heads).
- Custom chip for PCM
That's about all you'll need. It's essentially the same as going from a 5.7 TBI to Vortec. Different block, same results. If you were trying to make the '99 (4L60E I assume) transmission work with the '92 harness, that's an entirely different beast.