Welcome to TGC! Most common engine swaps for the 8G V6 are the 6G74 swap (3.5L Diamante motor) and the 6G75 swap (3.8L 4G Eclipse and 9G Galant motor). Besides sourcing a 6A13TT motor (2.5L twin-turbo 8G VR4 motor, found overseas) I'm not sure how easy they fit in our USDM engine bays since the frames are slightly different. Good luck and enjoy yourself!!
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