Is all your maintenance up to date? Do you have money to replace your entire cooling system first? Money to replace your head gasket and all oil seals? A stronger clutch? You'll probably want better suspension to help handle the extra power.
Going turbo isn't exactly cheap, or easy. There's a lot of other stuff you need to consider as well. I'm willing to bet its also easier to build your own kit for your specific wants/needs than to buy a turbo "kit" specifically for your car.
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