FullSizeChevy.com is currently going through updates so I'll post it here... has it ever crossed anyone's mind? I'm going to want more performance out of the 4.3 in my Sierra one day, and I'm unsure if I'll want to just go with a mild Vortec'd 350 or get a turbocharger setup built for the current 4.3. I'm pretty confident the crank can handle any reasonable amounts of boost, I'm sure a few of you know about the carbed 4.3 built in the past (Car Craft, Hot Rod, etc. used the article), then they added a centrifugal supercharger to it and it made close to 500hp. I'm just not sure of what the best way to control fuel/spark would be because I'd still need the EGR to be legal out here.
http://www.hotrod.com/techarticles/engine/113_0210_43l_chevy_v6_vortechs_supercharger_install/index.html
http://www.hotrod.com/techarticles/engine/113_0210_43l_chevy_v6_vortechs_supercharger_install/index.html