I’m doing a complete frame up restoration on my 92 Silverado 1500 two wheel drive. I’m going to keep it as original as possible. The truck came with the 4.3 v6 and I’m putting a new one in but I don’t really want to go back to the original 2 barrel throttle body. I guess I need to keep the ECM so my gauges and other things work as they should. Before I order the new intake, my question, what are my other options for fuel injection and do I get a 4 barrel intake?

 

I've got a 1996, which has true multi port fuel injection. 1995 and earlier used TBI (Throttle body injection), with an injector on each side of the throttle body (2 injectors). That was even on the 5.7L (350) V8, not just the V6. The TBI with 2 injectors is not really the same as a 2 barrel or 4 barrel carburetor like you may be thinking of. The TBI basically acts somewhat like a carburetor, but it's not quite the same thing. Those 2 injectors just add fuel to the air/fuel mix in a common spot, where it then gets fed to the intakes.

1996 and alter switch to an injector per cylinder, with a significantly different intake design. Or at least that is my understanding.

Switching the intake style on a 1992, or even the engine, say from a V6 to a V8, will require a new engine control module to match the intake style. I.e. the ECM you have won't work with the newer style intake with fuel injector rails on each side.

I have a friend here who had a 1994 Cheyenne C1500, and their mechanic could not find one of the TBI parts for a repair, and he ended up switching them over to a 4 barrel carburetor and a mechanical throttle linkage, as he could do that a lot easier apparently, without worrying about the ECM stuff. Personally I would have stuck with the TBI - I think he just didn't know where to source the parts. And sadly, 2 years later (this year), the truck caught fire and burned up, due to a fuel line link - which I personally blame on that mechanic not doing a good job.