if you're lucky, its rich on fuel, if you're unlucky, one of your cylinder's is going and the fuel isnt combusting. i'd probably check your filter first, if its clogged up it wont be getting enough air for complete combustion so it may blow black smoke.
it all depends on how much power you really want. some owners complain about the b16a after hyping it up so much, so im not too sure about it there. but engine swaps to me are relatively expensive and could probably be outclassed by modifying the existing engine.
if you have faith in your motor's durability, i'd go the way of the ebay turbo kit and replace some internals and maybe opt for a smaller faster spooling turbo from a wrecker. the ebay turbos are 600-ish, leaving you plenty for internals. but your motor's reliability will go down significantly beyond 5-8psi boost. but the turbo will increase the efficiency of your carbs by a fair bit so the power boost should be noticeable.




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