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1. If your engine makes power at a high peak, you need more carb. You would also need more carb in a constant WOT throttle situation, like drag racing.
2. I have no clue.
3. Yes. Especially with larger duration cams and a tight quench.
4. Why would you?
5. I think it's 6 of one, half dozen of the other. I usually select a piston based on the combustion chamber. Sometimes, you can't open the chambers up enough to get the CR down, so you have to run a dish piston. I shoot for pistons at zero deck and .040" head gasket thickness, so I get a real tight quench. As long as the quench pad is tight, I don't see a problem with big dishes. I consider it poor practice to put the pistons way down in the hole or use an incredibly thick gasket to put ratios where they should be.
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