Pretty much everything would be a problem. That motor was never offered in the Sidekick so you would need to fabricate new motor mounts, The swift is a transversely mounted FWD so you'll have to find a transmission that will bolt up and drive the rear wheels probably with a custom drive shaft not to mention the transfer case, I am pretty sure none of the Sidekick transmissions will bolt up. Or you could try replacing the front axle with with the Swift's setup. Either way it would be a lot of time and money only to put a smaller, weaker, less powerful motor, with less potential into an already underpowered vehicle.
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