The Mazda engine will probably be easier but the Ford engines are typically much cheaper. If it comes with an intake on the Mazda engine it should work with no problems but the ford engine will require an adapter plate to fit the intake from the 2.3 onto the 2.5. I’m not sure if the crank pulley on the Mazda 2.5 is the same as the 2.3 but they are different on the ford 2.5. There are a lot of threads on here that detail what is required for this swap weather it’s a Mazda 2.5 or a ford 2.5.
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