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You should be able to physically make it fit. Verify the position of the motor and transmission mounts, I believe the transmissions are the same between the engines (41te). Possibility that you may need to swap the ECU's.
According to the mitsu site I researched before my 3.5 swap, the trans will not interchange between the 4 cyl and 6 cyl. Apparently they have different bellhousing bolt patterns. check out this site http://www.club3g.com/forum/ and search there for more info.