On the headers, TTI's are great. Well made, fit as advertised and flow well. They should match up well with the TTI exhaust you have. On the carb, 800 is enough. Carb brand comes down to preference and what you are familair with tuning. On the rockers, go with good ones. Aluminum fatigues and the bargin rockers can let go pretty fast. I'm partial to the Comp "pro magnum" cast alloy steel rockers for a moderate build but a "better" grade aluminum rocker would work fine. For the ignition, the factory setup will light the fire just fine. The drawback is QC on the repop ignition boxes isn't so good. If you go that route, carry a spare. Overall, MSD is more reliable and multi strike sparks do help at idle and low RPM.