No......not easily
No, this change would require modifications that would cost more than just putting the correct engine back in.
A newly remanafactured engine for your XP (the 951cc) would run you about $1200 bucks with a one year, no fault warranty. The 96 XP uses the 787cc engine. Which that motor is a really nice and strong motor, you'll notice huge power loses if you go from the larger engine to the smaller.
Also, the MPEM of the 951 has the rectifier/regulator built into it. The 787 electrical system does not. So, if the charging system is messed up in the 787, at least it's a cheap fix. The 951 requires you replace the entire MPEM.:cheers: