Tried to search, but not finding what I'm needing....TBI seems to dominate all the discussions I find.....i'm attempting to find how to identify what intake and carb I'll need to get for my suburban but I'm coming to many intersections that I can't seem to cross 1983 Chevy Suburban 3/4 ton 350/700R4 I have dual pipes (factory, but no cat's) I have a smog pump Not sure if I have EGR What application am I looking for when I go for a Carb upgrade and intake? I.E. in the charts that apply to me, the carbs all have EGR and smog stuff.....but do I need to be there, or the pre-81 stuff even though mines an 83. From what I'm understanding I can't just drop a aftermarket carb on my stock manifold. I'd also like to put on headers and ditch the smog pump (NC doesn't smog test cars older than 95, I just get safety) will this effect what HEADERS I order? Love to either turn the smog pump into a compressor, or maybe ass an old ac compressor in that location for on board air....but thats another topic. All the applications are Pre-87 or Pre-81 (most of these are missing the smog stuff) Since mine is a 3/4 ton and didn't come with the full blown eco-friendly stuff I'm kind of in a bastard zone. Any help?