Re: Chevy Z-72...? a little O/T
From what I remember, the '96 was a form of TBI. In fact, fuel delivery was GM's achilles heel at the time. When the new small blocks were introduced a few years ago, carbs and TBI were phased out. All of the trucks now come with SFI, no matter what size the engine is.
Either way, the '96 is (as I recall) a TBI engine.
And there's no replacement for displacement. Your 350 will eat his 4.3 for breakfast. Just make sure to not get too much stuck in your grille! :-) You've both got decent trucks, but he's making his out to be a poser. Don't try to argue it. You know better...