[DeViL]

I gotta admit the 4.3L is not an easy engine to upgrade. Not much of a market out there for it. The high powered camshafts aren't emissions legal, I think you can only bore and stroke it out to a 4.5L and the gains aren't worth the money, neither is modifying the heads (there are no aluminum heads available). Headers will make a noticable difference though.

You are probably much better off dropping a 350 V8 if you are dead serious about drag racing. But alas, I'm messing with the V6 anyways. Best bet if you stick with the V6, a little better cam, a supercharger + intercooler, headers + exhaust, traction bars, 4.10 or 4.56 gears, and play around with the computer a bit with the Hypertech Power Programmer. You have a 94 so I don't know what exactly is available for your Sonoma, most aftermarket stuff out there is meant for 96 and up, so its probably just going to make it even harder for you.