Interesting, I think I'll have to pickup an EGR block plate. If I put on a block plate, will I still need to mess with the timing? I already did back it off a little after installing my carb because I was preigniting when I turned the truck off. So, the cylinders will run hotter without EGR? Is this bad?

On the charcoal canisters, do you know why there is vacuum running to them? I'm not sure if it's hooked to a vacuum source anymore, I'd have to look. Sounds like I'll keep them up and running.

So, no thoughts on the air switching valve? It's about the size and shape of the EGR, but in the front near the fuel pump. If I remember right it's hooked into the engine block and the intake manifold. It also feeds to the resonator (this is just an empty container for noise pollution, right?) which feeds back to the air cleaner. I can't remember if it's recycling air back to the carb or drawing air to the ASV...