Can a 3100 sfi engine fit in an 2004 Pontiac grand prix?

Yes, a 3100 SFI engine can fit in a 2004 Pontiac Grand Prix, as the vehicle originally offered a 3.1L V6 engine option that shares similarities with the 3100 SFI. However, modifications may be necessary for proper fitment, including adjustments to wiring harnesses and engine mounts. It's also important to ensure compatibility with the vehicle's transmission and other components. Always consult with a professional mechanic or automotive expert before proceeding with such an engine swap.