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It would worth to take a look at those Kubota V2203 engines, which can be had for relatively cheap and can still perform decently with some mild tuning. But since you're in Florida, I'd rather advice you to try to get some Isuzu 4J-series engine.
Or if you would rather want a gasser, a Vortec 5300 (or even a 4800) would still be more suitable than the 2.2L 4-pot. I wouldn't consider any naturally-aspirated gasser below 2.8L to be so suitable for your project, but if you wanna go with a 4-cylinder engine I could tell you to consider either turbocharge the engine or to try a Miller cycle setup with a supercharger and a regrinded cam to get a longer intake timing.
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